cd /tmp/workspace/attachments/8490e83f-f453-4de9-b14e-0a96867d2ed7/ && python3 -c " import pdfplumber with pdfplumber.open('SplitPDFFile_1_to_15.pdf') as pdf: print(f'Total pages: {len(pdf.pages)}') for i, page in enumerate(pdf.pages): text = page.extract_text() print(f'--- PAGE {i+1} ---') print(text) print() "

python3 -c " from pypdf import PdfReader, PdfWriter import os reader = PdfReader('/tmp/workspace/attachments/8490e83f-f453-4de9-b14e-0a96867d2ed7/SplitPDFFile_1_to_15.pdf') print(f'Pages: {len(reader.pages)}') # Check if pages have images for i, page in enumerate(reader.pages): images = page.images print(f'Page {i+1}: {len(images)} images') "

python3 -c " from pypdf import PdfReader import os os.makedirs('/tmp/workspace/prepladder_pages', exist_ok=True) reader = PdfReader('/tmp/workspace/attachments/8490e83f-f453-4de9-b14e-0a96867d2ed7/SplitPDFFile_1_to_15.pdf') for i, page in enumerate(reader.pages): for j, img in enumerate(page.images): ext = img.name.split('.')[-1] if '.' in img.name else 'png' path = f'/tmp/workspace/prepladder_pages/page_{i+1}.{ext}' with open(path, 'wb') as f: f.write(img.data) print(f'Saved page {i+1}: {path} ({len(img.data)} bytes)') "

cd /tmp/workspace && python3 -c " # Serve the images via a simple HTTP server temporarily # Actually, let's just use read_file to load each page as binary and then use base64 # Or better - use a task with read_file on images directly # Let me check if there's another way to read the images import base64 import os # Try to see if we can use pypdf to render pages # Check available tools import subprocess result = subprocess.run(['python3', '-c', 'import pdf2image; print(\"ok\")'], capture_output=True, text=True) print('pdf2image:', result.stdout, result.stderr) result2 = subprocess.run(['python3', '-c', 'import fitz; print(\"fitz ok\")'], capture_output=True, text=True) print('fitz/PyMuPDF:', result2.stdout, result2.stderr) result3 = subprocess.run(['python3', '-c', 'from PIL import Image; img = Image.open(\"/tmp/workspace/prepladder_pages/page_1.jpg\"); print(img.size)'], capture_output=True, text=True) print('PIL:', result3.stdout, result3.stderr) "

python3 -c " # Try serving files with a quick HTTP server on localhost import subprocess, threading, time, os # Start HTTP server in background server = subprocess.Popen(['python3', '-m', 'http.server', '8765', '--directory', '/tmp/workspace/prepladder_pages'], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL) time.sleep(1) print(f'Server PID: {server.pid}') print('Server started') # Test it import urllib.request try: resp = urllib.request.urlopen('http://localhost:8765/page_1.jpg', timeout=3) print(f'HTTP test: status {resp.status}, size {len(resp.read())} bytes') except Exception as e: print(f'HTTP test failed: {e}') "

python3 -c " from PIL import Image import os input_dir = '/tmp/workspace/prepladder_pages' output_dir = '/tmp/workspace/prepladder_small' os.makedirs(output_dir, exist_ok=True) for i in range(1, 16): src = f'{input_dir}/page_{i}.jpg' dst = f'{output_dir}/page_{i}.jpg' img = Image.open(src) # Resize to 800x1130 (roughly A4 at low res) to keep under 400KB img_resized = img.resize((900, 1272), Image.LANCZOS) img_resized.save(dst, 'JPEG', quality=60) size = os.path.getsize(dst) print(f'page_{i}: {size} bytes ({size < 512000})') "

python3 -c " from PIL import Image import os os.makedirs('/tmp/workspace/prepladder_crops', exist_ok=True) # Let's check dimensions of each page first for i in range(1, 16): img = Image.open(f'/tmp/workspace/prepladder_pages/page_{i}.jpg') print(f'Page {i}: {img.size} (WxH)') "

python3 << 'EOF' from PIL import Image import os os.makedirs('/tmp/workspace/prepladder_crops', exist_ok=True) def crop_and_save(page_num, crop_box, name, quality=80): """crop_box = (left, top, right, bottom) in pixels on 2480x3508 image""" img = Image.open(f'/tmp/workspace/prepladder_pages/page_{page_num}.jpg') cropped = img.crop(crop_box) # Resize to max 900px wide for web display w, h = cropped.size if w > 900: ratio = 900 / w cropped = cropped.resize((900, int(h * ratio)), Image.LANCZOS) path = f'/tmp/workspace/prepladder_crops/{name}.jpg' cropped.save(path, 'JPEG', quality=quality) size = os.path.getsize(path) print(f'Saved {name}: {cropped.size}, {size} bytes') return path # PAGE 1 (p103): # 1a. EEG table - Lennox row (image of waveform in absence row + hypsarrhythmia) # The EEG table spans roughly y=1450 to y=3300 # Absence seizure EEG waveform image is in the middle row of the table crop_and_save(1, (150, 1530, 1000, 1980), 'p1_absence_eeg_wave') # Hypsarrhythmia row - EEG image + Ash leaf macules photo crop_and_save(1, (150, 2290, 1000, 2780), 'p1_hypsarrhythmia_eeg') crop_and_save(1, (980, 2290, 1450, 2780), 'p1_ash_leaf_macules') # PAGE 4 (p106): Gram staining A image (Pneumococcus on microscopy) crop_and_save(4, (700, 2580, 1800, 3250), 'p4_gram_stain_pneumococcus') # PAGE 5 (p107): # Gram staining B + petechial rash/purpura crop_and_save(5, (500, 240, 1900, 900), 'p5_gram_stain_B_purpura') # PAGE 6 (p108): Nipah virus diagram crop_and_save(6, (450, 810, 2100, 1520), 'p6_nipah_diagram') # PAGE 7 (p109): MCQ images (TB meningitis CSF cobweb + ZN stain) crop_and_save(7, (1300, 430, 2300, 830), 'p7_tb_csf_znstain') # Kernig sign illustration crop_and_save(7, (500, 1450, 1900, 2050), 'p7_kernig_sign') # Brudzinski sign illustration crop_and_save(7, (500, 2280, 1900, 2900), 'p7_brudzinski_sign') # PAGE 8 (p110): Cryptococcus images (India ink + MRI + histology) crop_and_save(8, (350, 720, 2200, 1380), 'p8_crypto_images_top') crop_and_save(8, (350, 1410, 2200, 2050), 'p8_crypto_images_bottom') # PAGE 9 (p111): Cerebral malaria - blood smear images crop_and_save(9, (500, 250, 1700, 820), 'p9_malaria_smear1') crop_and_save(9, (500, 1050, 1700, 1580), 'p9_malaria_smear2') crop_and_save(9, (500, 1750, 1700, 2300), 'p9_malaria_smear3') # PAGE 10 (p112): # LP needles photo crop_and_save(10, (1550, 240, 2400, 820), 'p10_lp_needles') # Patient positioning image crop_and_save(10, (1500, 1200, 2450, 1750), 'p10_lp_positioning') # Layers diagram crop_and_save(10, (1100, 2350, 2450, 3350), 'p10_lp_layers') # PAGE 11 (p113): NCC MRI images crop_and_save(11, (170, 380, 800, 950), 'p11_ncc_mri_active') crop_and_save(11, (170, 1130, 800, 1700), 'p11_ncc_calcified') crop_and_save(11, (170, 1880, 800, 2450), 'p11_ncc_intracranial_calc') crop_and_save(11, (170, 2620, 800, 3180), 'p11_ncc_starry_sky') # MR spectroscopy graph crop_and_save(11, (170, 3200, 900, 3450), 'p11_mr_spectroscopy') # PAGE 12 (p114): # SAH - CSF tubes + CT head crop_and_save(12, (550, 1550, 2050, 2250), 'p12_sah_csf_ct') # PAGE 13 (p115): Cerebral angiography images (coiling) crop_and_save(13, (350, 280, 2100, 1100), 'p13_aneurysm_coiling') # MCQ NCCT image (subdural) crop_and_save(13, (1700, 2380, 2450, 2950), 'p13_subdural_ncct') # PAGE 14 (p116): # Chronic subdural NCCT + diagram crop_and_save(14, (500, 490, 1700, 1180), 'p14_chronic_subdural_ct') # DAI NCCT crop_and_save(14, (500, 1850, 1700, 2550), 'p14_dai_ncct') # PAGE 15 (p117): Extradural hemorrhage CT crop_and_save(15, (450, 190, 1550, 880), 'p15_extradural_ct') print("Done!") EOF

python3 << 'EOF' from PIL import Image import os def crop_and_save(page_num, crop_box, name, quality=80): img = Image.open(f'/tmp/workspace/prepladder_pages/page_{page_num}.jpg') cropped = img.crop(crop_box) w, h = cropped.size if w > 900: ratio = 900 / w cropped = cropped.resize((900, int(h * ratio)), Image.LANCZOS) path = f'/tmp/workspace/prepladder_crops/{name}.jpg' cropped.save(path, 'JPEG', quality=quality) size = os.path.getsize(path) print(f'Saved {name}: {cropped.size}, {size} bytes') # Fix SAH: CSF tubes + CT scan - page 12, SAH images are around y=1800-2500 crop_and_save(12, (550, 1820, 2050, 2520), 'p12_sah_csf_ct') # Fix NCC MRI active - push crop down to get full MRI image crop_and_save(11, (170, 500, 800, 1080), 'p11_ncc_mri_active') # Fix NCC row 2 - calcified cysticercosis crop_and_save(11, (170, 1200, 800, 1780), 'p11_ncc_calcified') # Fix NCC row 3 - intracranial calcifications crop_and_save(11, (170, 1960, 800, 2540), 'p11_ncc_intracranial_calc') # Fix NCC row 4 - starry sky crop_and_save(11, (170, 2700, 800, 3270), 'p11_ncc_starry_sky') # MR spectroscopy - push down more crop_and_save(11, (120, 3100, 900, 3450), 'p11_mr_spectroscopy') # Fix p13 subdural NCCT - the MCQ image is lower on page crop_and_save(13, (1700, 2450, 2450, 3050), 'p13_subdural_ncct') # Page 10 LP needles - fix crop crop_and_save(10, (1580, 280, 2430, 900), 'p10_lp_needles') # Fix ash leaf + hypsarrhythmia combo (bottom of page 1 table) crop_and_save(1, (150, 2750, 1480, 3290), 'p1_hypsarrhythmia_ash_combo') # Page 5 - Get just the purpura leg photo and gram stain B photo separately crop_and_save(5, (500, 240, 1150, 840), 'p5_gram_stain_B') crop_and_save(5, (1150, 240, 1900, 840), 'p5_purpura_legs') # DAI NCCT page 14 - fix crop_and_save(14, (500, 1950, 1700, 2600), 'p14_dai_ncct') # Chronic subdural page 14 - fix crop_and_save(14, (450, 550, 1700, 1250), 'p14_chronic_subdural_ct') # Page 13 MCQ acute subdural crop_and_save(13, (1680, 2380, 2460, 3080), 'p13_subdural_ncct') print('Done fixing crops!') EOF

python3 -c " import os files = os.listdir('/tmp/workspace/prepladder_crops') files.sort() for f in files: size = os.path.getsize(f'/tmp/workspace/prepladder_crops/{f}') print(f'{f}: {size} bytes') "

python3 << 'PYEOF' import base64, os def img_b64(name): path = f'/tmp/workspace/prepladder_crops/{name}.jpg' with open(path, 'rb') as f: return base64.b64encode(f.read()).decode() def img_tag(name, alt, width="100%", max_width="700px"): b64 = img_b64(name) return f'<img src="data:image/jpeg;base64,{b64}" alt="{alt}" style="max-width:{max_width};width:{width};display:block;margin:10px auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.15);">' html = """<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Neurology Part-1 | PrepLadder Breakdown</title> <style> body { font-family: 'Segoe UI', Arial, sans-serif; max-width: 960px; margin: 0 auto; padding: 20px; background: #f9f9f9; color: #222; line-height: 1.7; } h1 { background: linear-gradient(135deg, #1a73e8, #0d47a1); color: white; padding: 20px 30px; border-radius: 12px; font-size: 1.8em; } h2 { color: #1565C0; border-left: 5px solid #1565C0; padding-left: 14px; margin-top: 40px; font-size: 1.35em; } h3 { color: #2e7d32; margin-top: 24px; font-size: 1.1em; } h4 { color: #6a1b9a; margin-top: 18px; } .pink { color: #e91e8c; font-weight: bold; } .pink-box { background: #fff3f8; border: 2px solid #f48fb1; border-radius: 10px; padding: 16px 20px; margin: 18px 0; } .pink-box h3 { color: #c2185b; margin-top: 0; } .info-box { background: #fffde7; border: 2px solid #f9a825; border-radius: 10px; padding: 16px 20px; margin: 18px 0; } .info-box h3 { color: #e65100; margin-top: 0; } table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.93em; } th { background: #1565C0; color: white; padding: 10px 12px; text-align: left; } td { padding: 8px 12px; border: 1px solid #ccc; vertical-align: top; } tr:nth-child(even) { background: #f0f4ff; } .img-caption { text-align: center; font-size: 0.85em; color: #555; font-style: italic; margin-top: -6px; margin-bottom: 14px; } .img-wrap { margin: 16px auto; text-align: center; } ul { padding-left: 22px; } li { margin-bottom: 5px; } .section { background: white; border-radius: 12px; padding: 24px 30px; margin-bottom: 24px; box-shadow: 0 2px 6px rgba(0,0,0,0.08); } .fmge-box { background: #e8f5e9; border: 2px solid #43a047; border-radius: 10px; padding: 20px 24px; margin-top: 30px; } .fmge-box h2 { color: #1b5e20; border-color: #1b5e20; } .tag { display: inline-block; background: #e91e8c; color: white; border-radius: 4px; padding: 1px 7px; font-size: 0.8em; margin-right: 4px; font-weight: bold; } code { background: #f0f0f0; padding: 1px 5px; border-radius: 3px; font-family: monospace; } .stage-row { display: flex; gap: 16px; align-items: flex-start; flex-wrap: wrap; margin: 12px 0; } .stage-col { flex: 1; min-width: 220px; } hr { border: none; border-top: 2px solid #e0e0e0; margin: 30px 0; } </style> </head> <body> <h1>📚 Neurology Part-1 &mdash; Full Breakdown with Images</h1> <p style="color:#555;font-size:0.95em;">Source: PrepLadder Notes &bull; Topics: Seizures &bull; Epilepsy &bull; Meningitis &bull; Encephalitis &bull; LP &bull; NCC &bull; SAH &bull; Head Trauma</p> <!-- ===== SEIZURES & EPILEPSY ===== --> <div class="section"> <h2>TOPIC 1: Seizures and Epilepsy</h2> <h3>What is Epilepsy?</h3> <ul> <li><b>Epilepsy</b> = tendency to have <span class="pink">&ge;2 unprovoked seizures</span> (no clear trigger like fever or low blood sugar)</li> <li>Seizures from hypoglycemia, fever, or metabolic causes = <b>NOT epilepsy</b></li> <li><span class="pink">M/c cause of acquired epilepsy in India = Neurocysticercosis (NCC)</span></li> <li>NCC: Eating <i>Taenia solium</i> eggs &rarr; larvae travel to brain &rarr; cysts with scolex &rarr; vasogenic edema &rarr; <b>seizures</b></li> </ul> <h3>Normal EEG Rhythms</h3> <ul> <li>Eyes <b>open</b> &rarr; <span class="pink">Beta rhythm (13&ndash;30 Hz)</span></li> <li>Eyes <b>closed</b> &rarr; <span class="pink">Alpha rhythm (8&ndash;12 Hz)</span></li> </ul> <h3>EEG Pattern: 3Hz Spike-and-Slow-Wave (Absence Seizures)</h3> <div class="img-wrap">""" + img_tag('p1_absence_eeg_wave', '3Hz spike and slow wave EEG - Absence Seizures') + """</div> <p class="img-caption">&#128308; 3Hz spike-and-slow-wave pattern &rarr; Absence seizures</p> <h3>EEG Pattern: Hypsarrhythmia + Ash Leaf Macules (West Syndrome / Tuberous Sclerosis)</h3> <div class="img-wrap">""" + img_tag('p1_hypsarrhythmia_ash_combo', 'Hypsarrhythmia EEG and Ash Leaf Macules in Tuberous Sclerosis') + """</div> <p class="img-caption">&#128308; Hypsarrhythmia (Gross Chaotic pattern) = West Syndrome / Infantile Spasms &bull; Ash Leaf Macules = Tuberous Sclerosis</p> <h3>EEG Pattern Table</h3> <table> <tr><th>EEG Pattern</th><th>Condition</th><th>Drug of Choice (DOC)</th></tr> <tr><td><span class="pink">&lt;3Hz spike + slow wave</span></td><td>Lennox-Gastaut Syndrome</td><td>Sodium Valproate</td></tr> <tr><td><span class="pink">3Hz spike-and-slow-wave</span></td><td>Absence Seizures</td><td><span class="pink">Ethosuximide</span> (kids) / Valproate (adults) / Lamotrigine</td></tr> <tr><td><span class="pink">Hypsarrhythmia</span> (gross chaotic)</td><td>West Syndrome / Infantile Spasms</td><td>ACTH injection; <span class="pink">Vigabatrin</span> if Tuberous Sclerosis (ash leaf macules + Shagreen patch)</td></tr> </table> </div> <!-- ===== TYPES OF SEIZURES ===== --> <div class="section"> <h2>TOPIC 2: Types of Seizures</h2> <h3>1. Status Epilepticus (GSCE) &mdash; Medical Emergency</h3> <ul> <li>Seizures <b>&gt;5 minutes</b> with full body shaking (GTCS). Dangerous: metabolic acidosis, hypothermia, aspiration risk</li> <li><span class="pink">T1 (treat by) = &gt;5 minutes</span></li> <li><span class="pink">T2 (neuronal injury risk) = 30 minutes</span></li> <li><b>Treatment ladder:</b> <span class="pink">IV Lorazepam</span> &rarr; Phenytoin / Valproate / Levetiracetam &rarr; <span class="pink">IV Midazolam / Phenobarbital infusion</span> &rarr; Propofol under GA</li> </ul> <h3>2. Focal Seizures</h3> <ul> <li>Start with an <b>aura</b> (warning: strange smell, déjà vu)</li> <li><span class="pink">Jacksonian March</span>: Jerking starts in one finger/hand and "marches" up the arm along the motor cortex</li> <li><span class="pink">Todd's Paralysis</span>: Temporary weakness of the limb AFTER a focal seizure (NOT a stroke &mdash; resolves on its own in mins-hrs)</li> <li><b>Automatisms</b>: Unconscious repetitive acts (lip smacking, picking at clothes)</li> <li>MRI &rarr; <span class="pink">Mesial Temporal Sclerosis</span> (hippocampal scarring)</li> <li>DOC: <span class="pink">Carbamazepine</span> &bull; S/E: SIADH, Hyponatremia</li> <li>Medial temporal sclerosis &rarr; Surgery required</li> </ul> <h3>3. Atonic Seizures ("Drop Attacks")</h3> <ul> <li>Sudden loss of ALL muscle tone &rarr; falls and gets injured</li> <li><span class="pink">DOC: Sodium Valproate</span> &bull; S/E: Hyperammonemia, Pancreatitis, Alopecia</li> </ul> <h3>4. Myoclonic Seizures</h3> <ul> <li><span class="pink">vCJD</span>: Young adult ~30 yrs, dementia + startle myoclonus, <i>contaminated beef</i> &rarr; <b>prions</b> replicate in neurons, EEG: periodic spike-wave</li> <li><span class="pink">Juvenile Myoclonic Epilepsy (Janz Syndrome)</span>: Teenager, early morning jerks (drops toothbrush/cup), worsened by sleep deprivation, EEG: 4&ndash;6 Hz polyspike</li> <li><span class="pink">SSPE (Subacute Sclerosing Panencephalitis)</span>: 8-yr-old, myoclonus + neurodegeneration, <span class="pink">IgG antibodies to measles virus</span></li> <li><span class="pink">West Syndrome / Infantile Spasms</span>: Infant + EEG hypsarrhythmia</li> <li>DOC: <span class="pink">Sodium Valproate</span> &bull; <span class="pink">Avoid Oxcarbazepine</span> (worsens myoclonic seizures)</li> </ul> </div> <!-- ===== GTCS ===== --> <div class="section"> <h2>TOPIC 3: GTCS / Grand Mal Seizure</h2> <h3>Stages</h3> <p><span class="pink">Ictal cry &rarr; Tonus (&lt;30s) &rarr; Clonus (&lt;30s) &rarr; Post-ictal</span></p> <ul> <li><b>Ictal cry</b>: Sudden sound as chest muscles contract</li> <li><b>Tonic</b>: Body goes stiff/rigid</li> <li><b>Clonic</b>: Rhythmic jerking, eye rolling, perioral cyanosis (blue lips), frothing</li> <li><b>Post-ictal</b>: Unconscious, rattling sounds, bladder/bowel incontinence, confusion</li> <li>Duration: <span class="pink">&le;1 min</span> &bull; Do NOT restrain &bull; Recovery &lt;1 hr</li> <li>Treatment: <span class="pink">Sodium Valproate (~2 years, then taper)</span>; Alternative: Lamotrigine</li> </ul> <h3>Absence Seizures (Petit Mal)</h3> <ul> <li>Child zones out briefly &mdash; sudden blank stare, eyes open, unresponsive, then resumes normally</li> <li><b>No falling</b>, <b>no post-ictal confusion</b> (key difference from GTCS)</li> <li>Often seen as poor school performance / "daydreaming"</li> <li>EEG: <span class="pink">3Hz spike-and-wave</span></li> <li>DOC: <b>Ethosuximide</b></li> <li><span class="pink">AVOID: Carbamazepine, Phenytoin</span> &mdash; they WORSEN absence seizures</li> </ul> <h3>Gelastic Seizures</h3> <ul><li>Sudden uncontrollable laughing/giggling during a seizure</li></ul> <div class="pink-box"> <h3>&#128308; Important Pink Box &mdash; Key Facts</h3> <table> <tr><th>Fact</th><th>Answer</th></tr> <tr><td>M/c epilepsy in children</td><td><span class="pink">Rolandic epilepsy</span> (recurrent focal seizures)</td></tr> <tr><td>M/c seizures in children</td><td><span class="pink">Febrile seizures</span></td></tr> <tr><td>M/c seizures in neonates</td><td><span class="pink">Subtle seizures</span></td></tr> <tr><td>M/c cause of subtle seizures</td><td><span class="pink">Hypoxic Ischemic Encephalopathy (birth asphyxia)</span></td></tr> <tr><td>AEDs &uarr; risk of kidney stones + glaucoma</td><td><span class="pink">Topiramate, Zonisamide</span></td></tr> <tr><td>Only AED causing weight LOSS</td><td><b>Topiramate</b> (FDA approved) &mdash; all others &rarr; weight gain</td></tr> </table> </div> <h3>Lennox-Gastaut Syndrome</h3> <ul> <li>Multiple seizures: GTCS (morning) + Atonic (drop attacks) + Atypical absence</li> <li>EEG: &lt;3Hz spike and slow wave</li> <li><span class="pink">T/t: Sodium Valproate</span></li> </ul> <h3>Dravet Syndrome</h3> <ul> <li><span class="pink">SCN1A gene defect</span> (sodium channel)</li> <li>Prolonged / hemiclonic febrile seizures + intellectual disability</li> <li><span class="pink">T/t: Ketogenic diet + Cannabidiol + Valproate</span></li> </ul> </div> <!-- ===== FEBRILE SEIZURES ===== --> <div class="section"> <h2>TOPIC 4: Febrile Seizures</h2> <p>Seizures triggered by fever in children &mdash; brain is NOT infected; the fever itself triggers the seizure.</p> <h3>Drug Treatment</h3> <table> <tr><th>Situation</th><th>Drug</th></tr> <tr><td>Acute episode at home</td><td><span class="pink">Rectal Diazepam</span> (catheter tip 2cm from anus) OR <b>Intranasal Midazolam</b></td></tr> <tr><td>Intermediate prophylaxis</td><td><span class="pink">Oral Clobazam</span></td></tr> <tr><td>Continuous prophylaxis</td><td><span class="pink">Oral Valproate</span> (NOT Phenytoin)</td></tr> </table> <h3>Simple / Benign Febrile Seizures</h3> <ul> <li>GTCS within first 24 hrs of fever</li> <li><span class="pink">Single episode per fever, lasting &lt;15 min</span></li> <li>No post-ictal deficit &bull; Family history often present</li> </ul> <h3><span class="pink">Complex / Atypical Febrile Seizures</span></h3> <ul> <li><span class="pink">&gt;1 episode/fever OR focal seizure OR &gt;15 minutes</span></li> <li>Associated with Lennox-Gastaut syndrome</li> </ul> <div class="pink-box"> <h3>&#128308; ILAE 2025 Update (New Terms)</h3> <ul> <li><span class="pink">Epileptic Negative Myoclonus</span> (New Term): Conscious patient; hand drops object, knee buckles briefly; sudden loss of tone in ONE muscle group; <span class="pink">EMG silence 50&ndash;400 ms</span>; T/t: Valproate</li> <li>New focal seizure classification: Focal preserved consciousness / Focal impaired consciousness / Focal to bilateral tonic-clonic</li> <li><span class="pink">T1 for focal seizures = 10 min; T2 = 60 min</span></li> </ul> </div> <div class="pink-box"> <h3>&#128308; Asterixis / Flapping Tremor (Negative Myoclonus)</h3> <ul> <li>Arms + wrists extended &rarr; sudden brief loss of posture &rarr; <b>flapping movement</b></li> <li><span class="pink">Seen in: Hepatic encephalopathy, Uremic encephalopathy, CO&sub2; narcosis (acute exacerbation of chronic bronchitis)</span></li> <li>Graves' disease: <span class="pink">Fine finger tremors</span> (fast, small &mdash; NOT flapping)</li> </ul> </div> </div> <!-- ===== PYOGENIC MENINGITIS ===== --> <div class="section"> <h2>TOPIC 5: Pyogenic Meningitis</h2> <p><b>Classic scenario:</b> Fever + Headache + Nuchal rigidity (stiff neck)</p> <h3>Gram Staining A &mdash; Pneumococcus (Gram-positive Diplococcus)</h3> <div class="img-wrap">""" + img_tag('p4_gram_stain_pneumococcus', 'Gram stain showing Pneumococcus - Gram positive Diplococcus') + """</div> <p class="img-caption">Gram-positive Diplococcus &rarr; <b>Pneumococcus</b> &bull; #1 cause of bacterial meningitis in adults &bull; Also M/c cause of lobar pneumonia</p> <h3>Gram Staining B &mdash; N. meningitidis (Gram-negative) + Purpuric Rash on Skin</h3> <div class="img-wrap">""" + img_tag('p5_gram_stain_B_purpura', 'Gram stain B showing gram-negative N. meningitidis and purpuric rash on legs') + """</div> <p class="img-caption">Gram-negative organism &rarr; <span class="pink">N. meningitidis</span> &bull; Petechial rash / Purpura on extremities = Meningococcemia</p> <table> <tr><th>Situation</th><th>Organism</th></tr> <tr><td>Adults (3 months &ndash; 55 yrs)</td><td><b>Pneumococcus</b> &mdash; Draughtsman colonies</td></tr> <tr><td>Adults + Purpuric rash + Shock</td><td><span class="pink">N. meningitidis (Meningococcemia)</span></td></tr> <tr><td>Neonates &mdash; India</td><td>E. coli / Klebsiella</td></tr> <tr><td>Neonates &mdash; Global</td><td><span class="pink">Group B Streptococcus (S. agalactiae)</span></td></tr> </table> <h3>N. meningitidis Complication</h3> <ul> <li>DIC + adrenal hemorrhage &rarr; <span class="pink">Waterhouse-Friderichsen Syndrome</span> (&darr; BP, &darr; sugar &rarr; Addisonian crisis)</li> <li><b>Simple explanation:</b> Meningococcus destroys BOTH adrenal glands during sepsis &rarr; adrenals stop making cortisol &rarr; shock</li> </ul> <h3>Treatment</h3> <ul> <li><span class="pink">Guarded LP &rarr; start IV Ceftriaxone + Vancomycin within 60 minutes</span></li> <li>Mortality: <span class="pink">30% without antibiotics</span></li> <li>Add <b>Ampicillin</b> for alcoholics / heart transplant (Listeria not covered by Ceftriaxone)</li> <li>First 72 hrs (before culture): <span class="pink">Ceftriaxone + Vancomycin + Ampicillin</span></li> <li>Mass chemoprophylaxis for contacts: <span class="pink">Ciprofloxacin</span></li> <li>Recurrent meningococcal meningitis in adults: <span class="pink">C5&ndash;C9 complement deficiency</span></li> </ul> <div class="pink-box"> <h3>&#128308; PINFAN Mnemonic &mdash; Do CT BEFORE LP if any present</h3> <ul> <li><span class="pink"><b>P</b></span> &mdash; Papilledema (swollen optic disc = raised ICP)</li> <li><span class="pink"><b>I</b></span> &mdash; Immunocompromised</li> <li><span class="pink"><b>N</b></span> &mdash; New-onset seizures</li> <li><span class="pink"><b>F</b></span> &mdash; Focal neurological deficit</li> <li><span class="pink"><b>A</b></span> &mdash; Altered sensorium / low GCS</li> <li><span class="pink"><b>N</b></span> &mdash; Neoplasm / known CNS lesion</li> </ul> <p>LP contraindicated in raised ICP &rarr; risk of brain herniation. Give <span class="pink">Mannitol</span> first.</p> </div> </div> <!-- ===== VIRAL ENCEPHALITIS ===== --> <div class="section"> <h2>TOPIC 6: Viral Encephalitis</h2> <p><b>Scenario:</b> Village patient + High-grade fever (1&ndash;2 days) + Headache + Altered sensorium</p> <h3>HSV-1 Encephalitis</h3> <ul> <li><span class="pink">Overall MCC of viral encephalitis</span></li> <li>Loves the <b>temporal lobe</b> &rarr; amnesia</li> <li><span class="pink">IOC: CSF PCR for HSV-1</span> &bull; CSF has RBCs (hemorrhagic)</li> <li>MRI: Temporal lobe inflammation</li> <li>EEG: <span class="pink">PLED (Periodic Lateralized Epileptiform Discharges)</span></li> <li><span class="pink">Empirical T/t: Acyclovir</span> (start immediately, don't wait)</li> </ul> <h3>Japanese Encephalitis</h3> <ul> <li><span class="pink">Leading cause in India &mdash; UP, Gorakhpur</span></li> <li>Vector: <b>Culex mosquito</b> (dirty water / rice paddies) &bull; Vaccination available</li> </ul> <h3>Nipah Virus (Kerala, West Bengal)</h3> <div class="img-wrap">""" + img_tag('p6_nipah_diagram', 'Nipah virus transmission diagram - Fruit bats to pigs to humans') + """</div> <p class="img-caption">Nipah virus cycle: <span class="pink">Pteropus (fruit bats)</span> &rarr; contaminated fruit/date palm sap &rarr; pigs &rarr; humans &bull; Also human-to-human. Case fatality: <span class="pink">40&ndash;75%</span></p> </div> <!-- ===== CSF TABLE ===== --> <div class="section"> <h2>TOPIC 7: CSF Findings Table</h2> <table> <tr><th>Finding</th><th>Normal</th><th>Bacterial</th><th>TB Meningitis</th><th>Viral</th></tr> <tr><td>Cells</td><td>0&ndash;5 lymphocytes</td><td>&gt;1000 PMN (neutrophils)</td><td>100&ndash;1000 lymphocytes</td><td>25&ndash;100 lymphocytes</td></tr> <tr><td>Sugar</td><td>2/3 blood sugar</td><td>&lt;0.6 (LOW)</td><td>&lt;0.6 (LOW)</td><td>Normal</td></tr> <tr><td>Protein</td><td>15&ndash;45 mg%</td><td>HIGH &uarr;</td><td><span class="pink">VERY HIGH &gt;1g &mdash; Cobweb coagulum</span></td><td>Mildly &uarr;</td></tr> <tr><td>Pressure</td><td>10&ndash;20 mmHg</td><td>&uarr; HIGH</td><td>&uarr; HIGH</td><td>&uarr; HIGH</td></tr> <tr><td>Colour</td><td>Clear</td><td>Turbid/Cloudy</td><td>Clear/Straw</td><td>Clear</td></tr> </table> <p><span class="pink">Viral vs Fungal:</span> All same EXCEPT &mdash; Viral sugar = <b>Normal</b>; Fungal sugar = <b>LOW</b></p> <h3>MCQ &mdash; TB Meningitis: CSF Cobweb Coagulum + ZN Stain (Red bacilli = M. tuberculosis)</h3> <div class="img-wrap">""" + img_tag('p7_tb_csf_znstain', 'TB meningitis - CSF cobweb coagulum in test tube and ZN stain showing red bacilli') + """</div> <p class="img-caption"><span class="pink">Left: Cobweb coagulum</span> in CSF tube (protein plug floating like a spider web) &bull; <span class="pink">Right: ZN stain &rarr; Red bacilli = M. tuberculosis</span></p> </div> <!-- ===== MENINGEAL SIGNS ===== --> <div class="section"> <h2>TOPIC 8: Meningeal Signs</h2> <h3><span class="pink">Kernig's Sign</span></h3> <div class="img-wrap">""" + img_tag('p7_kernig_sign', "Kernig sign - one hand on knee, one on ankle, extend knee causes hamstring spasm and pain") + """</div> <p class="img-caption">One hand on knee + one on ankle &rarr; flex hip &rarr; try to <b>extend knee</b> &rarr; <span class="pink">hamstring spasm + pain</span> = Positive Kernig's</p> <h3><span class="pink">Brudzinski's Sign</span></h3> <div class="img-wrap">""" + img_tag('p7_brudzinski_sign', "Brudzinski sign - passive neck flexion causes involuntary hip and knee flexion") + """</div> <p class="img-caption">Hand under neck &rarr; lift/flex neck &rarr; <span class="pink">involuntary hip + knee flexion</span> = Positive Brudzinski's</p> <div class="info-box"> <h3>&#9888; Key Distinction</h3> <ul> <li><span class="pink">Nuchal rigidity</span>: Only testable in <b>conscious</b> patients (needs active neck flexion)</li> <li><b>Kernig / Brudzinski</b>: Can be done in <b>unconscious</b> patients</li> </ul> </div> </div> <!-- ===== TB MENINGITIS ===== --> <div class="section"> <h2>TOPIC 9: Tubercular Meningitis</h2> <ul> <li>Work-up: CECT &rarr; check for ventricular dilatation (hydrocephalus)</li> <li>If ventricular dilatation: Give Mannitol (&darr; ICP) &rarr; Recheck fundus &rarr; Guarded LP</li> <li>CECT finding: <b>Basal exudates</b> (pus/protein at brain base)</li> <li>CSF: <b>CBNAAT</b> (molecular test for TB)</li> <li>T/t: <b>ATT &times; 1 year</b> (Anti-TB Treatment)</li> <li><span class="pink">Dexamethasone &rarr; reduces vasogenic cerebral edema</span> (IV/NG if unconscious; oral if conscious)</li> </ul> </div> <!-- ===== CRYPTOCOCCUS ===== --> <div class="section"> <h2>TOPIC 10: Cryptococcus Neoformans</h2> <p><b>Scenario:</b> HIV positive patient + fever + headache + photophobia + papilledema + nuchal rigidity</p> <h3>Diagnostic Images: India Ink Stain / MRI / Histology</h3> <div class="img-wrap">""" + img_tag('p8_crypto_images_top', 'Cryptococcus - India ink negative stain showing capsule halos, MRI soap bubble appearance, histology') + """</div> <p class="img-caption"><b>Left: India ink stain</b> &mdash; dark background, <span class="pink">capsule appears as clear white halo</span> (negative stain) &bull; <b>Middle: MRI</b> &mdash; <span class="pink">soap bubble appearance</span> &bull; <b>Right: Histology</b></p> <div class="img-wrap">""" + img_tag('p8_crypto_images_bottom', 'Cryptococcus neoformans - second set of diagnostic images') + """</div> <p class="img-caption">Inference images &mdash; India ink, MRI, and tissue section confirming <b>Cryptococcus neoformans</b></p> <ul> <li><b>India Ink</b>: Background dark, capsule = clear halo (negative stain)</li> <li><b>Mucicarmine stain</b>: Stains capsule pink</li> <li><span class="pink">MRI: Soap bubble appearance</span> (also seen in Giant Cell Tumor / Osteoclastoma)</li> </ul> <h3>Mode of Entry</h3> <p>Pigeon droppings dust &rarr; inhaled into lungs &rarr; hematogenous spread (&darr; CMI in HIV) &rarr; crosses BBB &rarr; Meningitis</p> <h3>Work-up</h3> <ol> <li>MRI: Soap bubble appearance</li> <li>Guarded LP + CSF cytology (lymphocytes, &darr; sugar, &uarr; protein)</li> <li>Urine/blood lateral flow assay for <b>Cryptococcal antigen</b></li> </ol> <h3>Treatment</h3> <p><span class="pink">Liposomal Amphotericin B + Flucytosine IV &times; 2 weeks</span> &rarr; then Oral Fluconazole &times; 10 weeks (prevent recurrence)</p> </div> <!-- ===== CEREBRAL MALARIA ===== --> <div class="section"> <h2>TOPIC 11: Cerebral Malaria</h2> <p><b>Scenario:</b> Villager + 1-day high-grade fever + Altered sensorium + NO nuchal rigidity + &darr;Hb + &uarr;LDH + &uarr;unconjugated bilirubin</p> <h3>Blood Smear &mdash; Banana-shaped Gametocyte = Plasmodium falciparum</h3> <div class="img-wrap">""" + img_tag('p9_malaria_smear1', 'Blood smear showing banana-shaped gametocyte of Plasmodium falciparum') + """</div> <p class="img-caption"><span class="pink">Banana/crescent-shaped gametocyte</span> (curved purple cell) &rarr; <b>Plasmodium falciparum</b> (pathognomonic)</p> <h3>Multiple Ring Stages / Accole Forms = P. falciparum</h3> <div class="img-wrap">""" + img_tag('p9_malaria_smear2', 'Multiple ring stages and Accole forms inside RBCs - Plasmodium falciparum') + """</div> <p class="img-caption">Multiple ring stages &amp; Accole (appliqué) forms inside RBCs &rarr; <b>P. falciparum</b></p> <h3>Hemolysis Evidence on Smear</h3> <div class="img-wrap">""" + img_tag('p9_malaria_smear3', 'Blood smear showing hemolysis evidence in cerebral malaria') + """</div> <p class="img-caption"><span class="pink">Hemolysis evidence:</span> &darr; Hemoglobin &bull; &uarr; LDH &bull; &uarr; Unconjugated bilirubin (RBC destruction)</p> <h3>Pathogenesis</h3> <p>RBCs become sticky &rarr; Sluggish flow in cerebral cortex &rarr; No oxygen to brain &rarr; Encephalopathy &rarr; Altered sensorium</p> <h3>Diagnosis &amp; Treatment</h3> <ul> <li><span class="pink">Emergency: Dipstick test (Histidine-rich protein-2) / Card test</span> (few drops of blood, developed by GOI)</li> <li>Complication: <b>Blackwater fever</b> &rarr; Black urine (hemoglobinemia + hemoglobinuria + acute kidney dysfunction)</li> <li>Treatment: <span class="pink">IV/IM Artesunate</span></li> </ul> <div class="pink-box"> <h3>&#128308; Pink Box</h3> <p>Card test for <b>Kala-azar</b> = <span class="pink">RK39 antigen</span> (GOI approved)</p> </div> </div> <!-- ===== LUMBAR PUNCTURE ===== --> <div class="section"> <h2>TOPIC 12: Lumbar Puncture (LP)</h2> <p><b>Preferred site:</b> <span class="pink">L3&ndash;L4</span></p> <h3>LP Needle Types</h3> <div class="img-wrap">""" + img_tag('p10_lp_needles', 'Quincke cutting needle (A) vs Sprotte atraumatic needle (B)') + """</div> <p class="img-caption"><b>A = <span class="pink">Quincke</span></b> (cutting edge, sharper &rarr; larger dural hole &rarr; CSF leak &rarr; post-dural puncture headache) &bull; <b>B = <span class="pink">Sprotte</span></b> (atraumatic, thinner &rarr; recommended)</p> <h3>Patient Positioning &amp; Landmark</h3> <div class="img-wrap">""" + img_tag('p10_lp_positioning', 'LP patient positioning - lateral decubitus fetal position, L4/L5 and iliac crest landmark') + """</div> <p class="img-caption">Lateral decubitus (fetal position) &mdash; knees + neck flexed &bull; Line connecting both iliac crests = <span class="pink">Tuffier's line</span> = crosses at L4 &bull; Insert at <span class="pink">L3&ndash;L4</span></p> <h3>Layers Pierced During LP (In Order)</h3> <div class="img-wrap">""" + img_tag('p10_lp_layers', 'Anatomical diagram showing layers pierced during lumbar puncture') + """</div> <p class="img-caption">1. Skin &amp; subcutaneous tissue &rarr; 2. Supraspinous ligament &rarr; 3. Interspinous ligament &rarr; 4. <b>Ligamentum flavum</b> &rarr; 5. <b>Dura mater</b> &rarr; 6. <b>Arachnoid layer</b></p> <h3>Absolute Contraindications</h3> <ol><li>Raised ICP</li><li>Local skin infection</li><li>Kyphoscoliosis</li><li>Bleeding diathesis (warfarin etc.)</li></ol> <h3>CSF Collection Tubes</h3> <table> <tr><th>Tube</th><th>Test</th></tr> <tr><td>Tube A</td><td>Sugar &amp; Protein</td></tr> <tr><td>Tube B</td><td>Cytology (Neutrophils / Lymphocytes)</td></tr> <tr><td>Tube C</td><td>Culture</td></tr> <tr><td>Tube D</td><td>Special studies (CBNAAT, India ink, PCR HSV) &rarr; <b>Refrigerate</b></td></tr> </table> <div class="pink-box"> <h3>&#128308; CSF Facts</h3> <ul> <li>Production: <span class="pink">20 mL/hr</span></li> <li>Total volume: <span class="pink">150 mL</span> (brain + spinal cord)</li> </ul> </div> </div> <!-- ===== NCC ===== --> <div class="section"> <h2>TOPIC 13: Neurocysticercosis (NCC)</h2> <p><b>Cause:</b> Ingestion of proglottids (egg segments) of <i>Taenia solium</i> (pork tapeworm) &bull; <span class="pink">IOC: Contrast gadolinium-enhanced MRI</span> (ring-enhancing lesion with vasogenic edema)</p> <h3>MRI Stage 1 &mdash; Active (Larvae with Scolex)</h3> <div class="img-wrap">""" + img_tag('p11_ncc_mri_active', 'NCC MRI showing multiple hypointense lesions with eccentric scolex - active stage') + """</div> <p class="img-caption">Multiple hypointense lesions (black holes) with <span class="pink">eccentric scolex</span> = Active larvae &bull; T/t: <span class="pink">Albendazole + Praziquantel</span></p> <h3>MRI Stage 2 &mdash; Cysticercosis (Rice Grain Calcification)</h3> <div class="img-wrap">""" + img_tag('p11_ncc_calcified', 'NCC MRI showing rice grain calcification - cysticercosis stage') + """</div> <p class="img-caption"><span class="pink">Rice grain calcification</span> pattern &bull; T/t: <span class="pink">Praziquantel</span></p> <h3>Stage 3 &mdash; Intracranial Calcifications (Dead Calcified Larvae)</h3> <div class="img-wrap">""" + img_tag('p11_ncc_intracranial_calc', 'NCC CT showing intracranial calcifications - dead calcified larvae') + """</div> <p class="img-caption">Scattered calcifications = larvae died in muscle/brain &bull; T/t: <span class="pink">Sodium Valproate &times; 2 years</span></p> <h3>Stage 4 &mdash; "Starry Sky" Appearance</h3> <div class="img-wrap">""" + img_tag('p11_ncc_starry_sky', 'NCC MRI showing starry sky appearance - multiple eccentric scolices') + """</div> <p class="img-caption"><span class="pink">Starry sky</span> = Eccentric scolices developing in multiple brain areas simultaneously</p> <h3>MR Spectroscopy &mdash; Differentiating NCC from Tuberculoma</h3> <div class="img-wrap">""" + img_tag('p11_mr_spectroscopy', 'MR spectroscopy graph showing peaks to differentiate NCC from tuberculoma') + """</div> <p class="img-caption"><span class="pink">Lipid peak &rarr; Tuberculoma</span> &bull; <span class="pink">Amino acid peak &rarr; Neurocysticercosis</span></p> <h3>NCC vs Tuberculoma Comparison</h3> <table> <tr><th>Feature</th><th>NCC</th><th>Tuberculoma</th></tr> <tr><td>Lesion size</td><td>Usually &lt;20 mm</td><td>Often &gt;20 mm</td></tr> <tr><td>Number</td><td>Single or multiple</td><td>Often multiple</td></tr> <tr><td>Meningitis</td><td>NOT present</td><td>Usually associated</td></tr> <tr><td>Common location</td><td>Grey-white matter junction</td><td>Posterior fossa (M/c)</td></tr> <tr><td>Other spread</td><td>Eyes, muscles, subcutaneous</td><td>Secondary from elsewhere</td></tr> <tr><td>T2 MRI</td><td>Hyperintense + hypointense scolex; no midline shift</td><td>Hypointense; midline shift may be present</td></tr> <tr><td>MR spectroscopy</td><td>Amino acid peaks</td><td>Lipid peak</td></tr> </table> <h3>Treatment Protocol</h3> <ol> <li><b>Dexamethasone IV q6h &times; 48 hrs</b> (reduce vasogenic edema &rarr; prevents focal seizures)</li> <li><span class="pink">Albendazole (single lesion) / Albendazole + Praziquantel (multiple lesions)</span></li> <li><b>Valproate</b> for seizure control</li> </ol> </div> <!-- ===== SAH ===== --> <div class="section"> <h2>TOPIC 14: Subarachnoid Hemorrhage (SAH)</h2> <div class="pink-box"> <h3>&#128308; Classic Buzzwords</h3> <p><span class="pink">"Worst headache of my life"</span> &bull; <span class="pink">"Thunderclap headache"</span> (peaks in 1 minute, out of nowhere)</p> </div> <h3>CSF Tubes + CT Head (Xanthochromic CSF + Star of Death)</h3> <div class="img-wrap">""" + img_tag('p12_sah_csf_ct', 'SAH - CSF tubes showing xanthochromic fluid and CT head showing blood in basal cisterns') + """</div> <p class="img-caption"><b>Left: CSF tube</b> &mdash; initially pinkish/reddish (fresh RBCs); later <span class="pink">Xanthochromic</span> (yellow = RBC breakdown &rarr; bilirubin) &bull; <b>Right: CT head</b> &mdash; <span class="pink">blood in basal cisterns / Sylvian fissure</span></p> <h3>Endovascular Coiling vs Aneurysmal Clipping</h3> <div class="img-wrap">""" + img_tag('p13_aneurysm_coiling', 'Cerebral angiography showing endovascular coiling of Berry aneurysm and aneurysmal clipping') + """</div> <p class="img-caption"><b>Left: Endovascular coiling</b> &mdash; platinum wire coiled inside aneurysm to block blood flow (BEST treatment) &bull; <b>Right: Aneurysmal clipping</b> &mdash; surgical metal clip at base</p> <h3>Investigation Algorithm</h3> <ol> <li><span class="pink">First investigation: NCCT head</span></li> <li><span class="pink">Next best: Cerebral angiography</span> (find exact aneurysm location)</li> <li><span class="pink">If CT normal: Guarded LP</span> (xanthochromic CSF confirms SAH)</li> </ol> <h3>Treatment</h3> <ul> <li><span class="pink">Endovascular coiling</span> (best) or Aneurysmal clipping</li> <li><span class="pink">DOC vasospasm prevention: Nimodipine</span> (oral/NG tube)</li> </ul> <h3>Berry Aneurysm Key Facts</h3> <table> <tr><th>Fact</th><th>Answer</th></tr> <tr><td>M/c location</td><td><span class="pink">Anterior communicating artery / Anterior cerebral artery junction</span></td></tr> <tr><td>Most prone to rupture</td><td><span class="pink">Posterior communicating artery</span> (Top of Basilar artery) &rarr; CN-III compression &rarr; <b>Ptosis</b></td></tr> <tr><td>M/c cranial nerve involved</td><td><span class="pink">CN-III palsy</span></td></tr> </table> <h3>Leading Causes of Death After SAH</h3> <ol> <li><span class="pink">Vasospasm / Delayed cerebral ischemia</span></li> <li>Hydrocephalus &bull; 3. Bleeding &bull; 4. Rebleeding &bull; 5. Electrolyte imbalance</li> </ol> <p>BNP release &rarr; Natriuresis &rarr; Na &lt;125 &rarr; Seizures</p> <div class="pink-box"> <h3>&#128308; Pink Box &mdash; Thunderclap Headache also in:</h3> <p>Pituitary apoplexy &bull; CVT &bull; Acute hydrocephalus &bull; HTN crisis</p> </div> </div> <!-- ===== HEAD TRAUMA ===== --> <div class="section"> <h2>TOPIC 15: Head Trauma &mdash; Intracranial Hemorrhage</h2> <h3>Acute Subdural Hemorrhage</h3> <div class="img-wrap">""" + img_tag('p13_subdural_ncct', 'NCCT head showing acute subdural hemorrhage - crescent-shaped hyperdense lesion') + """</div> <p class="img-caption"><span class="pink">Crescent-shaped / Concavoconvex hyperdense lesion</span> &rarr; Acute subdural hemorrhage &bull; Source: <span class="pink">Cortical bridging veins</span> &bull; T/t: <span class="pink">Emergency craniotomy</span></p> <h3>Chronic Subdural Hemorrhage</h3> <div class="img-wrap">""" + img_tag('p14_chronic_subdural_ct', 'NCCT showing chronic subdural hemorrhage - concavoconvex hypodensity') + """</div> <p class="img-caption"><span class="pink">Crescent-shaped hypodensity</span> (dark = old blood) &rarr; Chronic subdural &bull; 3 weeks history, progressive confusion &bull; T/t: <span class="pink">Burr hole surgery</span> (via pterion)</p> <div class="pink-box"> <h3>&#128308; Pink Box</h3> <p><b>Decompressive hemicraniectomy</b> &rarr; Malignant cerebral edema (due to hemorrhagic stroke or blast injury)</p> </div> <h3>Diffuse Axonal Injury (DAI) / Traumatic Axonal Injury (TAI)</h3> <div class="img-wrap">""" + img_tag('p14_dai_ncct', 'NCCT showing diffuse axonal injury - punctuate hemorrhages at grey-white matter interface') + """</div> <p class="img-caption">Punctuate hemorrhages at grey-white matter interface &bull; <span class="pink">&ge;4 micro bleeds = DAI</span> &bull; Best investigation: <span class="pink">S-W-MRI (Susceptibility-Weighted MRI)</span> &bull; T/t: Endotracheal intubation + IPPV</p> <h3>Extradural / Epidural Hemorrhage</h3> <div class="img-wrap">""" + img_tag('p15_extradural_ct', 'CT head showing right extradural hemorrhage - biconvex lens-shaped lenticular hyperdensity') + """</div> <p class="img-caption"><span class="pink">Biconvex / Lens-shaped = Lenticular hyperdensity</span> (bright white) &rarr; Extradural hemorrhage &bull; Source: <span class="pink">Middle meningeal artery (Branch of ECA)</span> &bull; Lucid interval present &bull; T/t: <span class="pink">Craniotomy + ligation of bleeder</span></p> <div class="info-box"> <h3>&#9888; Lucid Interval</h3> <p>Pattern: Unconscious &rarr; Conscious (lucid interval) &rarr; Unconscious &bull; Seen in BOTH <b>subdural AND extradural</b> hemorrhage</p> </div> </div> <!-- ===== FMGE INSIGHTS ===== --> <div class="fmge-box"> <h2>&#127941; FMGE Insights &mdash; Top 50 High-Yield Points</h2> <h3>Seizures &amp; Epilepsy</h3> <ol> <li>Epilepsy = &ge;2 <b>unprovoked</b> seizures (metabolic/febrile do NOT count)</li> <li>MCC acquired epilepsy India = <b>Neurocysticercosis</b></li> <li>EEG 3Hz = Absence &bull; &lt;3Hz = LGS &bull; Hypsarrhythmia = West syndrome &bull; PLED = HSV encephalitis</li> <li>DOC Absence = Ethosuximide &bull; NEVER give Carbamazepine/Phenytoin</li> <li>Jacksonian March + Todd's Paralysis = Focal seizures</li> <li>SSPE = IgG measles antibodies, 8-yr-old, myoclonus + neurodegeneration</li> <li>Janz syndrome = teenager, morning jerks, worsened by sleep deprivation, EEG 4&ndash;6 Hz polyspike</li> <li>vCJD = contaminated beef, young adult, prions, dementia + myoclonus</li> <li>Only AED causing weight loss = <b>Topiramate</b></li> <li>AEDs &rarr; kidney stones + glaucoma = <b>Topiramate, Zonisamide</b></li> <li>SE treatment: IV Lorazepam &rarr; Phenytoin/Valproate &rarr; IV Midazolam &rarr; Propofol GA</li> <li>Dravet syndrome: SCN1A, ketogenic diet + cannabidiol</li> <li>ILAE 2025: Focal seizure T1 = 10 min, T2 = 60 min</li> </ol> <h3>Meningitis</h3> <ol start="14"> <li>MCC bacterial meningitis Adults = <b>Pneumococcus</b></li> <li>MCC bacterial meningitis Neonates (Global) = <b>Group B Streptococcus</b></li> <li>Waterhouse-Friderichsen = N. meningitidis &rarr; bilateral adrenal hemorrhage</li> <li>PINFAN = CT before LP (Papilledema, Immunocompromised, New seizure, Focal deficit, Altered, Neoplasm)</li> <li>LP contraindicated in raised ICP &rarr; use Mannitol first</li> <li>Antibiotics within 60 min = Ceftriaxone + Vancomycin &plusmn; Ampicillin</li> <li>Prophylaxis for meningococcal contacts = <b>Ciprofloxacin</b></li> <li>Recurrent meningococcal meningitis = <b>C5&ndash;C9 complement deficiency</b></li> </ol> <h3>CSF &amp; Viral Encephalitis</h3> <ol start="22"> <li>TB meningitis = lymphocytes + low sugar + VERY high protein + cobweb coagulum</li> <li>Viral vs fungal = same EXCEPT viral sugar = Normal; fungal sugar = LOW</li> <li>HSV encephalitis = temporal lobe + CSF PCR + PLED on EEG + Acyclovir</li> <li>Japanese encephalitis = UP/Gorakhpur, Culex mosquito</li> <li>Nipah = fruit bats (Pteropus), 40&ndash;75% mortality, Kerala/WB</li> </ol> <h3>Cryptococcus &amp; Malaria</h3> <ol start="27"> <li>India ink = dark background, capsule appears clear/white halo</li> <li>MRI soap bubble = Cryptococcus (also Giant Cell Tumor)</li> <li>Treatment = Amphotericin B + Flucytosine &times; 2 wks &rarr; Fluconazole &times; 10 wks</li> <li>Cerebral malaria treatment = IV/IM Artesunate</li> <li>Banana-shaped gametocyte = Plasmodium falciparum</li> <li>Blackwater fever = black urine from massive hemolysis = falciparum complication</li> </ol> <h3>Lumbar Puncture</h3> <ol start="33"> <li>Site = L3&ndash;L4 (Tuffier's line)</li> <li>Layers = Skin &rarr; Supraspinous &rarr; Interspinous &rarr; Ligamentum flavum &rarr; Dura &rarr; Arachnoid</li> <li>CSF: 20 mL/hr produced; total 150 mL volume</li> <li>Sprotte needle (atraumatic) preferred over Quincke (cutting)</li> </ol> <h3>NCC</h3> <ol start="37"> <li>IOC NCC = Contrast gadolinium-enhanced MRI (ring-enhancing lesion)</li> <li>Lipid peak MR spectroscopy = Tuberculoma &bull; Amino acid peak = NCC</li> <li>Rice grain calcification = NCC dead cyst &bull; T/t: Praziquantel</li> <li>Single lesion = Albendazole alone &bull; Multiple = Albendazole + Praziquantel</li> <li>Starry sky appearance = multiple eccentric scolices on MRI</li> </ol> <h3>SAH &amp; Head Trauma</h3> <ol start="42"> <li>"Worst headache of my life" + "Thunderclap headache" = SAH until proven otherwise</li> <li>M/c Berry aneurysm location = Anterior communicating artery</li> <li>Posterior communicating artery aneurysm &rarr; CN-III palsy (ptosis)</li> <li>DOC vasospasm in SAH = <b>Nimodipine</b></li> <li>Treatment SAH = Endovascular coiling (best)</li> <li>Xanthochromic CSF = SAH (old blood breakdown)</li> <li>Biconvex/lens-shaped CT = Extradural hemorrhage (middle meningeal artery / ECA)</li> <li>Crescent-shaped CT = Subdural hemorrhage (cortical bridging veins)</li> <li>Lucid interval = BOTH subdural AND extradural &bull; Chronic subdural = Burr hole &bull; Acute subdural = Emergency craniotomy</li> <li>DAI (&ge;4 microbleeds) = S-W-MRI for diagnosis &bull; Normal NCCT with same history = TAI</li> </ol> </div> <hr> <p style="text-align:center;color:#888;font-size:0.85em;">PrepLadder Neurology Part-1 &bull; Breakdown by Orris &bull; All images extracted from original notes</p> </body> </html>""" output_path = '/tmp/workspace/Neurology_Part1_Breakdown.html' with open(output_path, 'w', encoding='utf-8') as f: f.write(html) size_kb = os.path.getsize(output_path) / 1024 print(f"Saved: {output_path}") print(f"File size: {size_kb:.1f} KB") PYEOF

python3 << 'EOF' from PIL import Image import os os.makedirs('/tmp/workspace/prepladder_crops2', exist_ok=True) # All crops are done on the SMALL pages (900x1272 pixels) # I can see exactly where each image is in the small previews def crop_save(page, left, top, right, bottom, name): img = Image.open(f'/tmp/workspace/prepladder_small/page_{page}.jpg') w, h = img.size print(f"Page {page} size: {w}x{h}") c = img.crop((left, top, right, bottom)) path = f'/tmp/workspace/prepladder_crops2/{name}.jpg' c.save(path, 'JPEG', quality=85) print(f" Saved {name}: {c.size}, {os.path.getsize(path)} bytes") # ---- PAGE 1 (900x1272) ---- # EEG table: 3Hz spike-and-wave trace image (absence row) - approx y=590 to y=800, x=60 to x=390 crop_save(1, 60, 580, 390, 800, 'eeg_3hz_absence') # Hypsarrhythmia EEG + Ash leaf macules (bottom row of table) - approx y=825 to y=1030, x=60 to x=390 crop_save(1, 60, 825, 390, 1040, 'eeg_hypsarrhythmia_ashleaf') # ---- PAGE 4 (p106 - Gram stain A - Pneumococcus) ---- # The gram stain image is roughly y=830 to y=1060, x=230 to x=590 crop_save(4, 230, 830, 590, 1060, 'gram_stain_pneumococcus') # ---- PAGE 5 (p107 - Gram stain B + purpura legs) ---- # Both images side by side: y=70 to y=310, x=160 to x=620 crop_save(5, 160, 65, 620, 315, 'gram_stain_B_purpura') # ---- PAGE 6 (p108 - Nipah diagram) ---- # Nipah diagram: y=300 to y=600, x=140 to x=760 # But page 6 small was deleted! Need to use original img6 = Image.open('/tmp/workspace/prepladder_pages/page_6.jpg') w6, h6 = img6.size # 2480x3508 # Scale factor from small (900x1272) to full: 2480/900 = 2.756, 3508/1272 = 2.758 sf = 2480/900 # Nipah diagram in small coords: ~y=290 to y=590, x=140 to x=760 c6 = img6.crop((int(140*sf), int(290*sf), int(760*sf), int(590*sf))) c6_r = c6.resize((900, int(c6.size[1]*900/c6.size[0])), Image.LANCZOS) c6_r.save('/tmp/workspace/prepladder_crops2/nipah_diagram.jpg', 'JPEG', quality=85) print(f" Saved nipah_diagram: {c6_r.size}") # ---- PAGE 7 (p109 - CSF cobweb + ZN stain, Kernig, Brudzinski) ---- # MCQ images (CSF tube + ZN stain): top right area y=250 to y=400, x=500 to x=890 crop_save(7, 500, 245, 890, 400, 'tb_csf_znstain') # Kernig sign illustration: y=510 to y=720, x=200 to x=680 crop_save(7, 200, 505, 680, 715, 'kernig_sign') # Brudzinski sign illustration: y=810 to y=1020, x=200 to x=680 crop_save(7, 200, 800, 680, 1010, 'brudzinski_sign') # ---- PAGE 8 (p110 - Cryptococcus: India ink + MRI + histology) ---- # Top 3 images side by side: y=265 to y=450, x=60 to x=840 crop_save(8, 60, 260, 840, 455, 'crypto_india_ink_mri_histo') # Bottom 3 images (inference): y=510 to y=700, x=60 to x=840 crop_save(8, 60, 505, 840, 700, 'crypto_inference_images') # ---- PAGE 9 (p111 - Malaria blood smears) ---- # First smear (MCQ image): y=95 to y=330, x=180 to x=570 crop_save(9, 175, 90, 570, 340, 'malaria_smear_mcq') # Second smear (Diagnosis inference - banana gametocyte clear): y=390 to y=600, x=180 to x=570 crop_save(9, 175, 385, 570, 600, 'malaria_smear_banana') # Third smear (ring stages / hemolysis): y=665 to y=865, x=175 to x=575 crop_save(9, 175, 660, 575, 865, 'malaria_smear_rings') # ---- PAGE 10 (p112 - LP needles, positioning, layers) ---- # Needles photo (top right): y=50 to y=300, x=560 to x=890 crop_save(10, 555, 45, 890, 310, 'lp_needles') # Patient positioning diagram (right side): y=420 to y=600, x=545 to x=900 crop_save(10, 540, 415, 900, 608, 'lp_positioning') # Layers anatomy diagram (bottom right): y=640 to y=1005, x=400 to x=895 crop_save(10, 395, 635, 895, 1010, 'lp_layers_anatomy') # ---- PAGE 11 (p113 - NCC MRI stages) ---- # Row 1: MRI head with scolex: y=165 to y=395, x=55 to x=305 crop_save(11, 52, 160, 310, 400, 'ncc_mri_scolex') # Row 2: Cysticercosis/rice grain: y=430 to y=650, x=55 to x=305 crop_save(11, 52, 425, 310, 655, 'ncc_rice_grain') # Row 3: Intracranial calcifications: y=705 to y=920, x=55 to x=305 crop_save(11, 52, 700, 310, 925, 'ncc_intracranial_calc') # Row 4: Starry sky MRI: y=975 to y=1170, x=52 to x=305 crop_save(11, 52, 970, 310, 1175, 'ncc_starry_sky') # MR spectroscopy graph: y=1220 to y=1365, x=50 to x=280 crop_save(11, 48, 1215, 285, 1368, 'ncc_mr_spectroscopy') # ---- PAGE 12 (p114 - SAH: CSF tubes + CT) ---- # SAH images (CSF tubes + CT): y=615 to y=870, x=200 to x=780 crop_save(12, 195, 610, 780, 875, 'sah_csf_ct') # ---- PAGE 13 (p115 - Aneurysm coiling + clipping, MCQ subdural) ---- # Coiling + clipping images: y=100 to y=410, x=120 to x=795 crop_save(13, 115, 95, 800, 415, 'aneurysm_coiling_clipping') # MCQ subdural NCCT image (bottom right): y=900 to y=1130, x=620 to x=900 crop_save(13, 615, 895, 900, 1135, 'acute_subdural_ncct') # ---- PAGE 14 (p116 - chronic subdural CT + diagram, DAI NCCT) ---- # Chronic subdural CT + diagram side by side: y=185 to y=435, x=170 to x=640 crop_save(14, 168, 180, 645, 440, 'chronic_subdural_ct_diagram') # DAI NCCT (two panels): y=625 to y=850, x=165 to x=585 crop_save(14, 162, 620, 590, 855, 'dai_ncct') # ---- PAGE 15 (p117 - Extradural CT) ---- # Extradural CT: y=50 to y=295, x=145 to x=600 crop_save(15, 143, 48, 600, 300, 'extradural_ct') print("\n=== ALL DONE ===") EOF

python3 << 'EOF' from PIL import Image import os def crop_save(page, left, top, right, bottom, name): img = Image.open(f'/tmp/workspace/prepladder_small/page_{page}.jpg') c = img.crop((left, top, right, bottom)) path = f'/tmp/workspace/prepladder_crops2/{name}.jpg' c.save(path, 'JPEG', quality=85) print(f"Saved {name}: {c.size}") # Fix gram stain - push down more, just the microscopy image crop_save(4, 240, 890, 580, 1060, 'gram_stain_pneumococcus') # Fix NCC MRI scolex - need more height to see full MRI crop_save(11, 52, 195, 310, 430, 'ncc_mri_scolex') # Fix NCC rice grain - adjust crop_save(11, 52, 455, 310, 680, 'ncc_rice_grain') # Fix NCC intracranial calc crop_save(11, 52, 730, 310, 950, 'ncc_intracranial_calc') # Fix NCC starry sky crop_save(11, 52, 1000, 310, 1200, 'ncc_starry_sky') # Fix MR spectroscopy - get full graph crop_save(11, 48, 1230, 290, 1380, 'ncc_mr_spectroscopy') # Fix extradural CT - center it on just the CT crop_save(15, 250, 48, 620, 305, 'extradural_ct') # Fix SAH - ensure full images visible crop_save(12, 190, 620, 790, 885, 'sah_csf_ct') # Fix kernig and brudzinski - ensure full illustration crop_save(7, 180, 510, 700, 730, 'kernig_sign') crop_save(7, 180, 810, 700, 1025, 'brudzinski_sign') # Fix acute subdural MCQ - ensure full CT visible crop_save(13, 620, 895, 900, 1145, 'acute_subdural_ncct') print("Done!") EOF

python3 << 'EOF' from PIL import Image import os os.makedirs('/tmp/workspace/prepladder_crops2', exist_ok=True) PAGES = '/tmp/workspace/prepladder_pages' OUT = '/tmp/workspace/prepladder_crops2' # Scale factor: small (900x1272) -> full (2480x3508) = 2480/900 = 2.756 SF = 2480/900 def crop_full(page, sl, st, sr, sb, name, quality=82): """Crop from full-res page using small-page coordinates scaled up""" img = Image.open(f'{PAGES}/page_{page}.jpg') l, t, r, b = int(sl*SF), int(st*SF), int(sr*SF), int(sb*SF) c = img.crop((l, t, r, b)) # Resize to max 800px wide mw = 800 if c.width > mw: c = c.resize((mw, int(c.height * mw / c.width)), Image.LANCZOS) path = f'{OUT}/{name}.jpg' c.save(path, 'JPEG', quality=quality) kb = os.path.getsize(path)/1024 print(f" {name}: {c.size}, {kb:.0f}KB") print("=== Page 1: EEG tracings ===") # 3Hz absence trace: starts just below "3Hz spike and slow wave pattern" label (~y=630), ends before row boundary (~y=830) # x: just inside left cell wall (~x=65) to right of trace area (~x=385) crop_full(1, 65, 635, 385, 835, 'eeg_3hz_absence') # Hypsarrhythmia + ash leaf: EEG image starts ~y=945, both images end ~y=1080 crop_full(1, 62, 945, 388, 1090, 'eeg_hypsarrhythmia_ashleaf') print("=== Page 4: Gram stain A (Pneumococcus) ===") # Image is centered, roughly y=910 to y=1090, x=260 to x=570 crop_full(4, 255, 905, 575, 1090, 'gram_stain_pneumococcus') print("=== Page 5: Gram stain B + purpura legs ===") # Both images side by side: y=75 to y=305, x=160 to x=625 crop_full(5, 158, 72, 628, 310, 'gram_stain_B_purpura') print("=== Page 6: Nipah diagram ===") # Nipah diagram in small: ~y=300 to y=590, x=145 to x=760 crop_full(6, 145, 298, 762, 595, 'nipah_diagram') print("=== Page 7: CSF/ZN stain, Kernig, Brudzinski ===") # CSF tube + ZN stain images: top-right block, y=260 to y=398, x=510 to x=888 crop_full(7, 508, 258, 890, 400, 'tb_csf_znstain') # Kernig sign illustration: y=540 to y=730, x=225 to x=670 crop_full(7, 222, 535, 672, 730, 'kernig_sign') # Brudzinski sign: y=830 to y=1025, x=225 to x=670 crop_full(7, 222, 828, 672, 1025, 'brudzinski_sign') print("=== Page 8: Cryptococcus images ===") # 3 images top row: y=268 to y=456, x=62 to x=835 crop_full(8, 60, 265, 838, 458, 'crypto_images_top') # 3 images bottom row (inference): y=510 to y=703, x=62 to x=835 crop_full(8, 60, 508, 838, 706, 'crypto_images_bottom') print("=== Page 9: Malaria smears ===") # MCQ smear image: y=95 to y=338, x=178 to x=570 crop_full(9, 176, 93, 572, 340, 'malaria_smear1') # Inference banana smear: y=390 to y=600, x=178 to x=570 crop_full(9, 176, 388, 572, 602, 'malaria_smear2') # Ring stages smear: y=660 to y=865, x=176 to x=578 crop_full(9, 174, 658, 580, 868, 'malaria_smear3') print("=== Page 10: LP images ===") # Needle photos: y=50 to y=195, x=568 to x=888 (pencil-like objects) crop_full(10, 565, 48, 890, 200, 'lp_needles_pencils') # A/B needle diagrams below: y=240 to y=325, x=570 to x=888 crop_full(10, 565, 238, 890, 328, 'lp_needles_ab') # Patient positioning diagram: y=422 to y=605, x=545 to x=898 crop_full(10, 542, 420, 900, 608, 'lp_positioning') # Layers anatomy: y=640 to y=1010, x=398 to x=895 crop_full(10, 396, 638, 897, 1012, 'lp_layers_anatomy') print("=== Page 11: NCC MRI stages ===") # Row 1 MRI (scolex): image y=208 to y=398, x=55 to x=302 crop_full(11, 53, 205, 305, 400, 'ncc_mri_scolex') # Row 2 (rice grain legs): y=458 to y=660, x=55 to x=302 crop_full(11, 53, 455, 305, 662, 'ncc_rice_grain') # Row 3 (intracranial calc brain): y=728 to y=925, x=55 to x=302 crop_full(11, 53, 726, 305, 928, 'ncc_intracranial_calc') # Row 4 (starry sky): y=985 to y=1175, x=53 to x=302 crop_full(11, 51, 982, 305, 1178, 'ncc_starry_sky') # MR spectroscopy graph: y=1232 to y=1368, x=50 to x=286 crop_full(11, 48, 1230, 288, 1368, 'ncc_mr_spectroscopy') print("=== Page 12: SAH CSF + CT ===") # CSF tubes + CT: y=638 to y=886, x=198 to x=790 crop_full(12, 196, 635, 792, 888, 'sah_csf_ct') print("=== Page 13: Aneurysm coiling + subdural MCQ ===") # Coiling+clipping images: y=102 to y=418, x=118 to x=798 crop_full(13, 116, 100, 800, 420, 'aneurysm_coiling_clipping') # MCQ subdural NCCT: y=898 to y=1138, x=620 to x=900 crop_full(13, 618, 896, 902, 1140, 'acute_subdural_ncct') print("=== Page 14: Chronic subdural + DAI ===") # Chronic subdural CT + anatomy diagram: y=190 to y=448, x=170 to x=648 crop_full(14, 168, 188, 650, 450, 'chronic_subdural_ct') # DAI NCCT (two axial slices): y=632 to y=858, x=165 to x=590 crop_full(14, 163, 630, 592, 860, 'dai_ncct') print("=== Page 15: Extradural CT ===") # CT only: y=55 to y=302, x=250 to x=615 crop_full(15, 248, 53, 618, 304, 'extradural_ct') print("\n=== ALL DONE ===") import os files = sorted(os.listdir(OUT)) total = sum(os.path.getsize(f'{OUT}/{f}') for f in files) print(f"Total: {len(files)} images, {total/1024:.0f}KB") EOF

python3 << 'PYEOF' import base64, os OUT = '/tmp/workspace/prepladder_crops2' def b64(name): with open(f'{OUT}/{name}.jpg', 'rb') as f: return base64.b64encode(f.read()).decode() def img(name, alt, maxw='680px'): d = b64(name) return f'<img src="data:image/jpeg;base64,{d}" alt="{alt}" style="max-width:{maxw};width:100%;display:block;margin:10px auto;border-radius:6px;box-shadow:0 2px 10px rgba(0,0,0,0.18);">' def cap(text): return f'<p class="cap">{text}</p>' html = '''<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,initial-scale=1.0"> <title>Neurology Part-1 | PrepLadder Breakdown</title> <style> *{box-sizing:border-box;margin:0;padding:0} body{font-family:"Segoe UI",Arial,sans-serif;background:#f0f2f5;color:#1a1a1a;line-height:1.7;font-size:15px} .page{max-width:960px;margin:0 auto;padding:24px 16px} h1{background:linear-gradient(135deg,#1565C0,#0d47a1);color:#fff;padding:22px 28px;border-radius:14px;font-size:1.7em;margin-bottom:24px} h1 span{display:block;font-size:0.55em;opacity:0.85;font-weight:400;margin-top:4px} .card{background:#fff;border-radius:12px;padding:24px 28px;margin-bottom:20px;box-shadow:0 2px 8px rgba(0,0,0,0.07)} h2{color:#1565C0;font-size:1.25em;border-left:5px solid #1565C0;padding-left:12px;margin-bottom:16px;margin-top:4px} h3{color:#2e7d32;font-size:1.05em;margin:18px 0 8px} h4{color:#6a1b9a;font-size:0.98em;margin:14px 0 6px} .pink{color:#d81b60;font-weight:600} .pb{background:#fce4ec;border:1.5px solid #f48fb1;border-radius:10px;padding:14px 18px;margin:14px 0} .pb h3{color:#c2185b;margin-top:0} .ib{background:#fffde7;border:1.5px solid #f9a825;border-radius:10px;padding:14px 18px;margin:14px 0} .ib h3{color:#e65100;margin-top:0} .gb{background:#e8f5e9;border:1.5px solid #66bb6a;border-radius:10px;padding:14px 18px;margin:14px 0} .gb h2{color:#1b5e20;border-color:#1b5e20} table{width:100%;border-collapse:collapse;margin:12px 0;font-size:0.91em} th{background:#1565C0;color:#fff;padding:9px 11px;text-align:left} td{padding:7px 11px;border:1px solid #ddd;vertical-align:top} tr:nth-child(even) td{background:#f5f8ff} ul,ol{padding-left:22px;margin:6px 0} li{margin:4px 0} .imgbox{text-align:center;margin:14px 0} .cap{text-align:center;font-size:0.83em;color:#555;font-style:italic;margin-top:-6px;margin-bottom:12px;padding:0 8px} hr{border:none;border-top:2px solid #e8e8e8;margin:24px 0} .badge{display:inline-block;background:#d81b60;color:#fff;border-radius:4px;padding:1px 7px;font-size:0.78em;font-weight:700;margin-right:3px;vertical-align:middle} </style> </head> <body> <div class="page"> <h1>📚 Neurology Part-1 — Full Breakdown with Images<span>PrepLadder Notes · Topics: Seizures · Epilepsy · Meningitis · Encephalitis · LP · NCC · SAH · Head Trauma</span></h1> <!-- ====== SEIZURES ====== --> <div class="card"> <h2>TOPIC 1: Seizures and Epilepsy</h2> <h3>What is Epilepsy?</h3> <ul> <li><b>Epilepsy</b> = tendency to have <span class="pink">≥2 unprovoked seizures</span> (no clear trigger like fever or low blood sugar)</li> <li>Seizures from hypoglycemia or fever = <b>NOT epilepsy</b></li> <li><span class="pink">M/c cause of acquired epilepsy in India = Neurocysticercosis (NCC)</span></li> <li>NCC: Eat <i>Taenia solium</i> eggs → larvae travel to brain → cysts with scolex → vasogenic edema → seizures</li> </ul> <h3>Normal EEG Rhythms</h3> <ul> <li>Eyes <b>open</b> → <span class="pink">Beta rhythm (13–30 Hz)</span></li> <li>Eyes <b>closed</b> → <span class="pink">Alpha rhythm (8–12 Hz)</span></li> </ul> <h3>EEG Pattern: 3Hz Spike-and-Slow-Wave → Absence Seizures</h3> <div class="imgbox">''' + img('eeg_3hz_absence','3Hz spike and slow wave EEG pattern for Absence Seizures','620px') + '''</div> ''' + cap('🔴 3Hz spike-and-slow-wave pattern → Absence seizures · DOC: Ethosuximide (kids) / Valproate (adults)') + ''' <h3>EEG Pattern: Hypsarrhythmia + Ash Leaf Macules (West Syndrome / Tuberous Sclerosis)</h3> <div class="imgbox">''' + img('eeg_hypsarrhythmia_ashleaf','Hypsarrhythmia EEG and Ash Leaf Macules in Tuberous Sclerosis','620px') + '''</div> ''' + cap('🔴 Hypsarrhythmia = Gross Chaotic EEG pattern → West Syndrome / Infantile Spasms · Right: Ash Leaf Macules = Tuberous Sclerosis · DOC: ACTH injection; Vigabatrin if TS') + ''' <table> <tr><th>EEG Pattern</th><th>Condition</th><th>DOC</th></tr> <tr><td><span class="pink">&lt;3Hz spike + slow wave</span></td><td>Lennox-Gastaut Syndrome</td><td>Sodium Valproate</td></tr> <tr><td><span class="pink">3Hz spike-and-slow-wave</span></td><td>Absence Seizures</td><td>Ethosuximide (kids) / Valproate (adults)</td></tr> <tr><td><span class="pink">Hypsarrhythmia (Gross Chaotic)</span></td><td>West Syndrome / Infantile Spasms</td><td>ACTH; <span class="pink">Vigabatrin</span> if Tuberous Sclerosis</td></tr> </table> </div> <!-- ====== TYPES OF SEIZURES ====== --> <div class="card"> <h2>TOPIC 2: Types of Seizures</h2> <h3>1. Status Epilepticus (GSCE) — Medical Emergency</h3> <ul> <li>Seizures >5 mins with full body shaking (GTCS). Risk: metabolic acidosis, hypothermia, aspiration, death</li> <li><span class="pink">T1 (treat by) = >5 min · T2 (brain damage) = 30 min</span></li> <li><b>Treatment ladder:</b> <span class="pink">IV Lorazepam</span> → Phenytoin/Valproate/Levetiracetam → <span class="pink">IV Midazolam/Phenobarbital infusion</span> → Propofol GA</li> </ul> <h3>2. Focal Seizures</h3> <ul> <li>Start with <b>aura</b> (warning: smell, déjà vu)</li> <li><span class="pink">Jacksonian March</span>: Jerking starts in one finger and "marches" up the arm along the motor cortex map</li> <li><span class="pink">Todd's Paralysis</span>: Temporary post-seizure weakness of the affected limb (NOT a stroke — resolves in mins-hrs)</li> <li><b>Automatisms</b>: Unconscious lip smacking, picking activity</li> <li>MRI → <span class="pink">Mesial Temporal Sclerosis</span> (hippocampal scarring)</li> <li>DOC: <span class="pink">Carbamazepine</span> · S/E: SIADH, Hyponatremia</li> </ul> <h3>3. Atonic Seizures ("Drop Attacks")</h3> <ul> <li>Sudden total loss of muscle tone → falls and gets injured</li> <li><span class="pink">DOC: Sodium Valproate</span> · S/E: Hyperammonemia, Pancreatitis, Alopecia</li> </ul> <h3>4. Myoclonic Seizures</h3> <ul> <li><span class="pink">vCJD</span>: Young adult ~30 yrs, dementia + startle myoclonus, contaminated beef → <b>prions</b> replicate in neurons</li> <li><span class="pink">Juvenile Myoclonic Epilepsy (Janz Syndrome)</span>: Teenager, early morning jerks, worsened by sleep deprivation, EEG 4–6 Hz polyspike</li> <li><span class="pink">SSPE</span>: 8-yr-old boy, myoclonus + neurodegeneration, <span class="pink">IgG antibodies to measles virus</span></li> <li><span class="pink">West Syndrome / Infantile Spasms</span>: Infant + hypsarrhythmia EEG</li> <li>DOC: <span class="pink">Sodium Valproate</span> · <span class="pink">Avoid Oxcarbazepine</span> (worsens myoclonic seizures)</li> </ul> </div> <!-- ====== GTCS ====== --> <div class="card"> <h2>TOPIC 3: GTCS / Grand Mal Seizure</h2> <p>Stages: <span class="pink">Ictal cry → Tonus (&lt;30s) → Clonus (&lt;30s) → Post-ictal</span></p> <ul> <li><b>Tonic</b>: Body stiff/rigid · <b>Clonic</b>: Rhythmic jerking, perioral cyanosis, frothing</li> <li><b>Post-ictal</b>: Unconscious, rattling sounds, bladder/bowel incontinence, confusion</li> <li>Duration: <span class="pink">≤1 min</span> · Do NOT restrain tightly · Recovery &lt;1 hr</li> <li>T/t: <span class="pink">Sodium Valproate (~2 years, then taper)</span></li> </ul> <h3>Absence Seizures (Petit Mal)</h3> <ul> <li>Child suddenly zones out — stares blankly, eyes open, unresponsive for seconds, then resumes normally</li> <li><b>No falling, no post-ictal confusion</b> (key difference from GTCS)</li> <li>EEG: <span class="pink">3Hz spike-and-wave</span> · DOC: <b>Ethosuximide</b></li> <li><span class="pink">AVOID: Carbamazepine, Phenytoin</span> — they WORSEN absence seizures</li> </ul> <h3>Gelastic Seizures</h3> <p>Sudden uncontrollable laughing/giggling during a seizure</p> <div class="pb"> <h3>🔴 Important — Key Facts</h3> <table> <tr><th>Fact</th><th>Answer</th></tr> <tr><td>M/c epilepsy in children</td><td><span class="pink">Rolandic epilepsy</span> (focal)</td></tr> <tr><td>M/c seizures in children</td><td><span class="pink">Febrile seizures</span></td></tr> <tr><td>M/c seizures in neonates</td><td><span class="pink">Subtle seizures</span></td></tr> <tr><td>M/c cause of neonatal subtle seizures</td><td><span class="pink">Hypoxic Ischemic Encephalopathy (birth asphyxia)</span></td></tr> <tr><td>AED → kidney stones + glaucoma</td><td><span class="pink">Topiramate, Zonisamide</span></td></tr> <tr><td>Only AED causing weight LOSS</td><td><b>Topiramate</b> (FDA approved)</td></tr> </table> </div> <h3>Lennox-Gastaut Syndrome</h3> <ul> <li>Multiple seizure types: GTCS (morning) + Atonic (drop attacks) + Atypical absence</li> <li>EEG: &lt;3Hz spike and slow wave · <span class="pink">T/t: Sodium Valproate</span></li> </ul> <h3>Dravet Syndrome</h3> <ul> <li><span class="pink">SCN1A gene defect</span> (sodium channel) · Prolonged febrile seizures + intellectual disability</li> <li><span class="pink">T/t: Ketogenic diet + Cannabidiol + Valproate</span></li> </ul> </div> <!-- ====== FEBRILE SEIZURES ====== --> <div class="card"> <h2>TOPIC 4: Febrile Seizures</h2> <p>Seizures triggered by fever in children — brain is NOT infected; the fever itself triggers the seizure</p> <table> <tr><th>Situation</th><th>Drug</th></tr> <tr><td>Acute at home</td><td><span class="pink">Rectal Diazepam</span> (catheter 2cm from anus) OR Intranasal Midazolam</td></tr> <tr><td>Intermediate prophylaxis</td><td><span class="pink">Oral Clobazam</span></td></tr> <tr><td>Continuous prophylaxis</td><td><span class="pink">Oral Valproate</span> (NOT Phenytoin)</td></tr> </table> <h3>Simple Febrile Seizures</h3> <ul> <li>GTCS within first 24 hrs of fever · <span class="pink">Single episode per fever, &lt;15 min</span> · No post-ictal deficit</li> </ul> <h3><span class="pink">Complex Febrile Seizures</span></h3> <ul> <li><span class="pink">&gt;1 episode per fever OR focal seizure OR &gt;15 minutes</span> · Associated with Lennox-Gastaut</li> </ul> <div class="pb"> <h3>🔴 ILAE 2025 Update</h3> <ul> <li><span class="pink">Epileptic Negative Myoclonus</span> (New Term): Conscious, hand drops object, knee buckles; sudden loss of tone in one muscle; <span class="pink">EMG silence 50–400 ms</span> · T/t: Valproate</li> <li>Focal seizure timing: <span class="pink">T1 = 10 min · T2 = 60 min</span></li> </ul> </div> <div class="pb"> <h3>🔴 Asterixis / Flapping Tremor</h3> <ul> <li>Arms + wrists extended → sudden brief flapping movement</li> <li><span class="pink">Seen in: Hepatic encephalopathy · Uremic encephalopathy · CO₂ narcosis</span></li> <li>Graves' disease: <span class="pink">Fine finger tremors</span> (fast, small — NOT flapping)</li> </ul> </div> </div> <!-- ====== PYOGENIC MENINGITIS ====== --> <div class="card"> <h2>TOPIC 5: Pyogenic Meningitis</h2> <p><b>Classic scenario:</b> Fever + Headache + Nuchal rigidity (stiff neck)</p> <h3>Gram Staining A — Pneumococcus (Gram-positive Diplococcus)</h3> <div class="imgbox">''' + img('gram_stain_pneumococcus','Gram stain A - Pneumococcus gram positive diplococcus','500px') + '''</div> ''' + cap('Gram-positive Diplococcus → Pneumococcus · #1 cause of bacterial meningitis in adults · Also M/c cause of lobar pneumonia') + ''' <h3>Gram Staining B — N. meningitidis (Gram-negative) + Purpuric Rash / Purpura</h3> <div class="imgbox">''' + img('gram_stain_B_purpura','Gram stain B gram negative meningitidis and purpuric rash on legs','620px') + '''</div> ''' + cap('Left: Gram-negative stain → N. meningitidis · Right: Petechial rash / Purpura on legs = Meningococcemia') + ''' <table> <tr><th>Situation</th><th>Organism</th></tr> <tr><td>Adults (3 months – 55 yrs)</td><td><b>Pneumococcus</b> — Draughtsman colonies</td></tr> <tr><td>Adults + Purpuric rash + Distributive shock</td><td><span class="pink">N. meningitidis (Meningococcemia)</span></td></tr> <tr><td>Neonates — India</td><td>E. coli / Klebsiella</td></tr> <tr><td>Neonates — Global</td><td><span class="pink">Group B Streptococcus (S. agalactiae)</span></td></tr> </table> <h3>N. meningitidis Complication</h3> <ul> <li>DIC + adrenal hemorrhage → <span class="pink">Waterhouse-Friderichsen Syndrome</span> (↓BP, ↓sugar = Addisonian crisis)</li> </ul> <h3>Treatment</h3> <ul> <li><span class="pink">Guarded LP → IV Ceftriaxone + Vancomycin within 60 minutes</span></li> <li>Mortality: <span class="pink">30% without antibiotics</span></li> <li>Add <b>Ampicillin</b> for alcoholics/transplant (Listeria not covered by Ceftriaxone)</li> <li>First 72 hrs: <span class="pink">Ceftriaxone + Vancomycin + Ampicillin</span></li> <li>Mass prophylaxis for contacts: <span class="pink">Ciprofloxacin</span></li> <li>Recurrent meningococcal meningitis: <span class="pink">C5–C9 complement deficiency</span></li> </ul> <div class="pb"> <h3>🔴 PINFAN — Do CT/MRI BEFORE LP if any present</h3> <ul> <li><span class="pink">P</span> — Papilledema · <span class="pink">I</span> — Immunocompromised · <span class="pink">N</span> — New-onset seizures</li> <li><span class="pink">F</span> — Focal neurological deficit · <span class="pink">A</span> — Altered sensorium/low GCS · <span class="pink">N</span> — Neoplasm/known CNS lesion</li> </ul> <p>LP contraindicated in raised ICP → risk of brain herniation. Give <span class="pink">Mannitol</span> first.</p> </div> </div> <!-- ====== VIRAL ENCEPHALITIS ====== --> <div class="card"> <h2>TOPIC 6: Viral Encephalitis</h2> <p><b>Scenario:</b> Village patient + High-grade fever (1–2 days) + Headache + Altered sensorium</p> <h3>HSV-1 Encephalitis</h3> <ul> <li><span class="pink">Overall MCC of viral encephalitis</span> · Loves temporal lobe → amnesia</li> <li><span class="pink">IOC: CSF PCR for HSV-1</span> · CSF has RBCs (hemorrhagic encephalitis)</li> <li>EEG: <span class="pink">PLED (Periodic Lateralized Epileptiform Discharges)</span></li> <li><span class="pink">Empirical T/t: Acyclovir</span> (start immediately, don't wait for PCR)</li> </ul> <h3>Japanese Encephalitis</h3> <ul> <li><span class="pink">Leading cause in India — UP, Gorakhpur</span> · Vector: Culex mosquito (dirty water) · Vaccine available</li> </ul> <h3>Nipah Virus (Kerala, West Bengal)</h3> <div class="imgbox">''' + img('nipah_diagram','Nipah virus transmission diagram - fruit bats to pigs to humans via contaminated fruits','680px') + '''</div> ''' + cap('Nipah cycle: 🔴 Pteropus fruit bats → Blood/Urine/Saliva → Contaminated fruit/date palm sap → Pigs → Humans · Also human-to-human · Case fatality: 🔴 40–75%') + ''' </div> <!-- ====== CSF TABLE ====== --> <div class="card"> <h2>TOPIC 7: CSF Findings</h2> <table> <tr><th>Finding</th><th>Normal</th><th>Bacterial</th><th>TB Meningitis</th><th>Viral</th></tr> <tr><td>Cells</td><td>0–5 lymphocytes</td><td>&gt;1000 PMN (neutrophils)</td><td>100–1000 lymphocytes</td><td>25–100 lymphocytes</td></tr> <tr><td>Sugar</td><td>2/3 blood sugar</td><td>&lt;0.6 (LOW)</td><td>&lt;0.6 (LOW)</td><td>Normal</td></tr> <tr><td>Protein</td><td>15–45 mg%</td><td>↑ HIGH</td><td><span class="pink">&gt;1g — Cobweb coagulum</span></td><td>Mildly ↑</td></tr> <tr><td>Pressure</td><td>10–20 mmHg</td><td>↑</td><td>↑</td><td>↑</td></tr> <tr><td>Colour</td><td>Clear</td><td>Turbid/Cloudy</td><td>Clear/Straw</td><td>Clear</td></tr> </table> <p><span class="pink">Viral vs Fungal:</span> All same EXCEPT — Viral sugar = Normal · Fungal sugar = LOW</p> <h4>MCQ Answer — TB Meningitis: CSF Cobweb Coagulum + ZN Stain (Red bacilli = M. tuberculosis)</h4> <div class="imgbox">''' + img('tb_csf_znstain','TB meningitis CSF cobweb coagulum and ZN stain showing red bacilli','580px') + '''</div> ''' + cap('Left: Cobweb coagulum in CSF tube (very high protein forms a web-like clot) · Right: ZN stain → 🔴 Red bacilli = M. tuberculosis') + ''' </div> <!-- ====== MENINGEAL SIGNS ====== --> <div class="card"> <h2>TOPIC 8: Meningeal Signs</h2> <h3><span class="pink">Kernig's Sign</span></h3> <div class="imgbox">''' + img('kernig_sign',"Kernig sign - one hand on knee one on ankle extend knee causes hamstring spasm",'540px') + '''</div> ''' + cap('One hand on knee + one on ankle → flex hip → try to extend knee → 🔴 hamstring spasm + pain = Positive Kernig\'s') + ''' <h3><span class="pink">Brudzinski's Sign</span></h3> <div class="imgbox">''' + img('brudzinski_sign',"Brudzinski sign - passive neck flexion causes involuntary hip and knee flexion",'540px') + '''</div> ''' + cap('Hand under neck → lift/flex neck → 🔴 involuntary hip + knee flexion = Positive Brudzinski\'s') + ''' <div class="ib"> <h3>⚠ Key Distinction</h3> <ul> <li><span class="pink">Nuchal rigidity</span>: Only in <b>conscious</b> patients (needs active cooperation)</li> <li><b>Kernig / Brudzinski</b>: Can be done in <b>unconscious</b> patients</li> </ul> </div> </div> <!-- ====== TB MENINGITIS ====== --> <div class="card"> <h2>TOPIC 9: Tubercular Meningitis</h2> <ul> <li>Work-up: CECT → ventricular dilatation? → Mannitol (↓ICP) → Recheck fundus → Guarded LP</li> <li>CECT finding: <b>Basal exudates</b> (pus at brain base) · CSF: <b>CBNAAT</b></li> <li>T/t: <b>ATT × 1 year</b></li> <li><span class="pink">Dexamethasone → ↓vasogenic cerebral edema</span> (IV/NG if unconscious; oral if conscious)</li> </ul> </div> <!-- ====== CRYPTOCOCCUS ====== --> <div class="card"> <h2>TOPIC 10: Cryptococcus Neoformans</h2> <p><b>Scenario:</b> HIV positive + fever + headache + photophobia + papilledema + nuchal rigidity</p> <h4>Diagnostic Images: India Ink / MRI / Histology</h4> <div class="imgbox">''' + img('crypto_images_top','Cryptococcus India ink stain MRI soap bubble appearance and histology','720px') + '''</div> ''' + cap('Left: India ink — dark background, capsule appears as clear white halo (negative stain) · Middle: MRI — 🔴 soap bubble appearance · Right: Histology') + ''' <div class="imgbox">''' + img('crypto_images_bottom','Cryptococcus inference images - India ink MRI histology','720px') + '''</div> ''' + cap('Inference images confirming Cryptococcus neoformans') + ''' <ul> <li><b>India Ink</b>: Background dark, capsule = clear halo (negative stain)</li> <li><b>Mucicarmine stain</b>: Stains capsule pink</li> <li><span class="pink">MRI: Soap bubble appearance</span> (also seen in Giant Cell Tumor / Osteoclastoma)</li> <li>Entry: Pigeon droppings → lungs → blood (↓CMI in HIV) → crosses BBB → meningitis</li> </ul> <h3>Treatment</h3> <p><span class="pink">Liposomal Amphotericin B + Flucytosine IV × 2 weeks</span> → then Oral Fluconazole × 10 weeks</p> </div> <!-- ====== CEREBRAL MALARIA ====== --> <div class="card"> <h2>TOPIC 11: Cerebral Malaria</h2> <p><b>Scenario:</b> Villager + 1-day high-grade fever + Altered sensorium + NO nuchal rigidity + ↓Hb + ↑LDH + ↑unconjugated bilirubin</p> <h3>Blood Smear — MCQ Diagnostic Image</h3> <div class="imgbox">''' + img('malaria_smear1','Malaria blood smear MCQ showing banana-shaped gametocyte Plasmodium falciparum','560px') + '''</div> ''' + cap('🔴 Banana/crescent-shaped gametocyte (curved purple cell) → Plasmodium falciparum (pathognomonic)') + ''' <h3>Inference — Banana-shaped Gametocyte (clear view)</h3> <div class="imgbox">''' + img('malaria_smear2','Blood smear showing banana shaped gametocyte clearly - Plasmodium falciparum','560px') + '''</div> ''' + cap('Classic banana gametocyte clearly visible → P. falciparum confirmed') + ''' <h3>Multiple Ring Stages / Accole Forms</h3> <div class="imgbox">''' + img('malaria_smear3','Multiple ring stages and Accole forms inside RBCs - P falciparum hemolysis','560px') + '''</div> ''' + cap('Multiple ring stages & Accole (appliqué) forms inside RBCs → P. falciparum · 🔴 Hemolysis: ↓Hb · ↑LDH · ↑Unconjugated bilirubin') + ''' <ul> <li>Pathogenesis: RBCs sticky → sluggish cerebral flow → encephalopathy → altered sensorium</li> <li><span class="pink">Diagnosis: Dipstick test (Histidine-rich protein-2) / Card test</span> (GOI developed)</li> <li>Complication: <b>Blackwater fever</b> → black urine (hemoglobinemia + hemoglobinuria + AKI)</li> <li>T/t: <span class="pink">IV/IM Artesunate</span></li> </ul> <div class="pb"><h3>🔴 Card test for Kala-azar = RK39 antigen (GOI)</h3></div> </div> <!-- ====== LP ====== --> <div class="card"> <h2>TOPIC 12: Lumbar Puncture (LP)</h2> <p>Preferred site: <span class="pink">L3–L4</span></p> <h3>LP Needle Types</h3> <div class="imgbox">''' + img('lp_needles_pencils','Quincke and Sprotte LP needles - pencil-like side by side','420px') + '''</div> <div class="imgbox">''' + img('lp_needles_ab','LP needle A Quincke cutting edge and B Sprotte atraumatic','420px') + '''</div> ''' + cap('A = 🔴 Quincke (cutting edge — sharper, larger hole → CSF leak → post-dural puncture headache) · B = 🔴 Sprotte (atraumatic, thinner → recommended)') + ''' <h3>Patient Positioning</h3> <div class="imgbox">''' + img('lp_positioning','LP patient lateral decubitus fetal position with L4L5 iliac crest landmark','520px') + '''</div> ''' + cap('Lateral decubitus (fetal position) — knees + neck flexed · 🔴 Tuffier\'s line = connects both iliac crests = crosses at L4 · Insert at L3–L4') + ''' <h3>Layers Pierced During LP (In Order)</h3> <div class="imgbox">''' + img('lp_layers_anatomy','Anatomical diagram of layers pierced during lumbar puncture from skin to arachnoid','600px') + '''</div> ''' + cap('1. Skin & subcutaneous · 2. Supraspinous ligament · 3. Interspinous ligament · 4. Ligamentum flavum · 5. Dura mater · 6. Arachnoid layer') + ''' <div class="pb"> <h3>🔴 CSF Facts</h3> <ul><li>Production: <span class="pink">20 mL/hr</span> · Total volume: <span class="pink">150 mL</span> (brain + spinal cord)</li></ul> </div> <table> <tr><th>Tube</th><th>Test</th></tr> <tr><td>Tube A</td><td>Sugar &amp; Protein</td></tr> <tr><td>Tube B</td><td>Cytology (Neutrophils / Lymphocytes)</td></tr> <tr><td>Tube C</td><td>Culture</td></tr> <tr><td>Tube D</td><td>Special studies (CBNAAT, India ink, PCR HSV) → <b>Refrigerate</b></td></tr> </table> </div> <!-- ====== NCC ====== --> <div class="card"> <h2>TOPIC 13: Neurocysticercosis (NCC)</h2> <p>Cause: Ingestion of <i>Taenia solium</i> eggs · <span class="pink">IOC: Contrast gadolinium-enhanced MRI</span> (ring-enhancing lesion)</p> <h3>MRI Stage 1 — Active (Multiple hypointense lesions with Scolex)</h3> <div class="imgbox">''' + img('ncc_mri_scolex','NCC MRI Stage 1 - multiple hypointense black holes with eccentric scolex active larvae','500px') + '''</div> ''' + cap('Multiple hypointense lesions (black holes) with 🔴 eccentric scolex = Active larvae · T/t: 🔴 Albendazole + Praziquantel') + ''' <h3>Stage 2 — Rice Grain Calcification (Cysticercosis)</h3> <div class="imgbox">''' + img('ncc_rice_grain','NCC Stage 2 rice grain calcification cysticercosis','500px') + '''</div> ''' + cap('🔴 Rice grain calcification pattern (dead cyst calcifying) · T/t: 🔴 Praziquantel') + ''' <h3>Stage 3 — Intracranial Calcifications (Dead calcified larvae)</h3> <div class="imgbox">''' + img('ncc_intracranial_calc','NCC Stage 3 intracranial calcifications dead calcified larvae on CT','500px') + '''</div> ''' + cap('Scattered calcifications = larvae died in muscle/brain · T/t: 🔴 Sodium Valproate × 2 years') + ''' <h3>Stage 4 — "Starry Sky" Appearance</h3> <div class="imgbox">''' + img('ncc_starry_sky','NCC Stage 4 starry sky appearance multiple eccentric scolices MRI','500px') + '''</div> ''' + cap('🔴 Starry sky = eccentric scolices developing in multiple brain areas simultaneously') + ''' <h3>MR Spectroscopy — Differentiate NCC from Tuberculoma</h3> <div class="imgbox">''' + img('ncc_mr_spectroscopy','MR spectroscopy graph showing lipid and amino acid peaks to differentiate NCC from tuberculoma','440px') + '''</div> ''' + cap('🔴 Lipid peak → Tuberculoma · 🔴 Amino acid (Lip+Lac) peak → Neurocysticercosis') + ''' <table> <tr><th>Feature</th><th>NCC</th><th>Tuberculoma</th></tr> <tr><td>Lesion size</td><td>&lt;20 mm</td><td>&gt;20 mm</td></tr> <tr><td>Meningitis</td><td>NOT present</td><td>Usually associated</td></tr> <tr><td>Common location</td><td>Grey-white matter junction</td><td>Posterior fossa (M/c)</td></tr> <tr><td>T2 MRI</td><td>Hyperintense + hypointense scolex; no midline shift</td><td>Hypointense; midline shift possible</td></tr> <tr><td>MR spectroscopy</td><td>Amino acid peaks</td><td>Lipid peak</td></tr> </table> <h3>Treatment Protocol</h3> <ol> <li>Dexamethasone IV q6h × 48 hrs (reduce vasogenic edema → prevents focal seizures)</li> <li><span class="pink">Albendazole (single lesion) / Albendazole + Praziquantel (multiple lesions)</span></li> <li>Valproate for seizure control</li> </ol> </div> <!-- ====== SAH ====== --> <div class="card"> <h2>TOPIC 14: Subarachnoid Hemorrhage (SAH)</h2> <div class="pb"><h3>🔴 Classic Buzzwords</h3> <p>"Worst headache of my life" · "Thunderclap headache" (peaks in 1 minute, out of nowhere)</p></div> <h3>CSF Tubes + CT Head</h3> <div class="imgbox">''' + img('sah_csf_ct','SAH diagnostic images - xanthochromic CSF tubes and CT head showing blood in basal cisterns','620px') + '''</div> ''' + cap('Left: CSF tubes — initially pinkish/reddish (RBCs); later 🔴 Xanthochromic (yellow = bilirubin from RBC breakdown) · Right: CT head — 🔴 blood in basal cisterns / Sylvian fissure') + ''' <h3>Endovascular Coiling vs Aneurysmal Clipping</h3> <div class="imgbox">''' + img('aneurysm_coiling_clipping','Endovascular coiling of Berry aneurysm (left) and aneurysmal surgical clipping (right)','680px') + '''</div> ''' + cap('Left: Endovascular coiling — platinum wire inside aneurysm blocks blood flow (🔴 BEST treatment) · Right: Aneurysmal clipping — surgical metal clip at base') + ''' <h3>Investigation Algorithm</h3> <ol> <li><span class="pink">NCCT head (first)</span></li> <li><span class="pink">Cerebral angiography (next best)</span> — find exact aneurysm location</li> <li><span class="pink">If CT normal: Guarded LP</span> — xanthochromic CSF confirms SAH</li> </ol> <h3>Key Facts</h3> <ul> <li><span class="pink">M/c Berry aneurysm location: Anterior communicating artery / ACA junction</span></li> <li><span class="pink">Most prone to rupture: Posterior communicating artery</span> → compresses CN-III → Ptosis</li> <li>DOC for vasospasm: <span class="pink">Nimodipine</span> · T/t: <span class="pink">Endovascular coiling</span></li> <li>Leading cause of death: 1. Vasospasm 2. Hydrocephalus 3. Bleeding 4. Rebleeding 5. Electrolytes</li> </ul> <div class="pb"><h3>🔴 Thunderclap headache also in:</h3> <p>Pituitary apoplexy · CVT · Acute hydrocephalus · HTN crisis</p></div> </div> <!-- ====== HEAD TRAUMA ====== --> <div class="card"> <h2>TOPIC 15: Head Trauma — Intracranial Hemorrhage</h2> <h3>Acute Subdural Hemorrhage — NCCT</h3> <div class="imgbox">''' + img('acute_subdural_ncct','Acute subdural hemorrhage NCCT showing crescent shaped hyperdense concavoconvex lesion','460px') + '''</div> ''' + cap('🔴 Crescent-shaped / Concavoconvex hyperdense lesion · Source: Cortical bridging veins (slow venous bleed) · T/t: 🔴 Emergency craniotomy') + ''' <h3>Chronic Subdural Hemorrhage + CT + Anatomy Diagram</h3> <div class="imgbox">''' + img('chronic_subdural_ct','Chronic subdural hemorrhage NCCT concavoconvex hypodensity dark crescent and anatomy diagram','640px') + '''</div> ''' + cap('Left: NCCT — crescent-shaped hypodensity (dark = old blood) · Right: Anatomy showing subdural space between dura and arachnoid · T/t: 🔴 Burr hole surgery (via pterion)') + ''' <div class="pb"><h3>🔴 Decompressive hemicraniectomy → Malignant cerebral edema</h3> <p>Caused by hemorrhagic stroke or blast injury</p></div> <h3>Diffuse Axonal Injury (DAI) / Traumatic Axonal Injury (TAI)</h3> <div class="imgbox">''' + img('dai_ncct','DAI NCCT showing punctuate hemorrhages at grey white matter interface diffuse axonal injury','580px') + '''</div> ''' + cap('Punctuate hemorrhages at grey-white matter interface · 🔴 ≥4 micro bleeds = DAI · Best investigation: 🔴 S-W-MRI (Susceptibility-Weighted MRI) · T/t: ETT + IPPV') + ''' <h3>Extradural / Epidural Hemorrhage — CT</h3> <div class="imgbox">''' + img('extradural_ct','Extradural epidural hemorrhage CT showing biconvex lens-shaped lenticular hyperdensity','480px') + '''</div> ''' + cap('🔴 Biconvex / Lens-shaped = Lenticular hyperdensity (bright white) · Source: 🔴 Middle meningeal artery (Branch of ECA) · Pattern: Unconscious → Conscious (lucid interval) → Unconscious · T/t: 🔴 Craniotomy + ligation of bleeder') + ''' <div class="ib"><h3>⚠ Lucid Interval</h3> <p>Seen in BOTH <b>subdural AND extradural</b> hemorrhage</p></div> </div> <!-- ====== FMGE ====== --> <div class="gb"> <h2>🏆 FMGE Insights — Top 50 High-Yield Points</h2> <h3>Seizures &amp; Epilepsy</h3> <ol> <li>Epilepsy = ≥2 unprovoked seizures (metabolic/febrile do NOT count)</li> <li>MCC acquired epilepsy India = Neurocysticercosis</li> <li>EEG: 3Hz = Absence · &lt;3Hz = LGS · Hypsarrhythmia = West · PLED = HSV encephalitis</li> <li>DOC Absence = Ethosuximide · NEVER give Carbamazepine/Phenytoin</li> <li>Jacksonian March + Todd's Paralysis = Focal seizures</li> <li>SSPE = IgG measles antibodies, 8-yr-old, myoclonus + neurodegeneration</li> <li>Janz syndrome = teenager, morning jerks, sleep deprivation worsens, EEG 4–6 Hz polyspike</li> <li>vCJD = contaminated beef, young adult, prions, dementia + myoclonus</li> <li>Only AED causing weight loss = Topiramate</li> <li>AEDs → nephrolithiasis + glaucoma = Topiramate, Zonisamide</li> <li>SE treatment: IV Lorazepam → Phenytoin/Valproate → IV Midazolam → Propofol GA</li> <li>Dravet syndrome: SCN1A, ketogenic diet + cannabidiol</li> <li>ILAE 2025: Focal seizure T1 = 10 min, T2 = 60 min</li> </ol> <h3>Meningitis</h3> <ol start="14"> <li>MCC bacterial meningitis Adults = Pneumococcus</li> <li>MCC bacterial meningitis Neonates (Global) = Group B Streptococcus</li> <li>Waterhouse-Friderichsen = N. meningitidis → bilateral adrenal hemorrhage</li> <li>PINFAN = CT before LP (Papilledema, Immunocompromised, New seizure, Focal deficit, Altered, Neoplasm)</li> <li>LP contraindicated in raised ICP → use Mannitol first</li> <li>Antibiotics within 60 min = Ceftriaxone + Vancomycin ± Ampicillin</li> <li>Prophylaxis for meningococcal contacts = Ciprofloxacin</li> <li>Recurrent meningococcal meningitis = C5–C9 complement deficiency</li> </ol> <h3>CSF &amp; Encephalitis</h3> <ol start="22"> <li>TB meningitis = lymphocytes + low sugar + very high protein + cobweb coagulum</li> <li>Viral vs Fungal = same EXCEPT viral sugar Normal; fungal sugar LOW</li> <li>HSV encephalitis = temporal lobe + CSF PCR + PLED on EEG + Acyclovir</li> <li>Japanese encephalitis = UP/Gorakhpur, Culex mosquito</li> <li>Nipah = fruit bats (Pteropus), 40–75% mortality, Kerala/WB</li> </ol> <h3>Cryptococcus &amp; Malaria</h3> <ol start="27"> <li>India ink = dark background, capsule appears clear white halo</li> <li>MRI soap bubble = Cryptococcus (also Giant Cell Tumor)</li> <li>Treatment = Amphotericin B + Flucytosine × 2 wks → Fluconazole × 10 wks</li> <li>Cerebral malaria T/t = IV/IM Artesunate</li> <li>Banana-shaped gametocyte = P. falciparum · Blackwater fever = black urine (massive hemolysis)</li> </ol> <h3>Lumbar Puncture</h3> <ol start="32"> <li>Site = L3–L4 (Tuffier's line)</li> <li>Layers = Skin → Supraspinous → Interspinous → Ligamentum flavum → Dura → Arachnoid</li> <li>CSF: 20 mL/hr produced; total 150 mL</li> <li>Sprotte (atraumatic) preferred over Quincke (cutting)</li> </ol> <h3>NCC</h3> <ol start="36"> <li>IOC NCC = Contrast gadolinium-enhanced MRI (ring-enhancing lesion)</li> <li>Lipid peak MR spectroscopy = Tuberculoma · Amino acid peak = NCC</li> <li>Rice grain calcification = NCC dead cyst · T/t: Praziquantel</li> <li>Single lesion = Albendazole alone · Multiple = Albendazole + Praziquantel</li> <li>Starry sky = multiple eccentric scolices on MRI</li> </ol> <h3>SAH &amp; Head Trauma</h3> <ol start="41"> <li>"Worst headache of my life" + "Thunderclap" = SAH until proven otherwise</li> <li>M/c Berry aneurysm = Anterior communicating artery</li> <li>Posterior communicating artery aneurysm → CN-III palsy (ptosis)</li> <li>DOC vasospasm in SAH = Nimodipine</li> <li>T/t SAH = Endovascular coiling (best)</li> <li>Xanthochromic CSF = SAH (old blood breakdown to bilirubin)</li> <li>Biconvex/lens CT = Extradural hemorrhage (middle meningeal artery / ECA)</li> <li>Crescent CT = Subdural hemorrhage (cortical bridging veins)</li> <li>Lucid interval = BOTH subdural AND extradural · Chronic subdural = Burr hole · Acute subdural = Craniotomy</li> <li>DAI (≥4 microbleeds) = S-W-MRI · Normal NCCT with same history = TAI</li> </ol> </div> <p style="text-align:center;color:#999;font-size:0.82em;margin-top:20px">PrepLadder Neurology Part-1 · Breakdown by Orris · All images extracted directly from notes</p> </div> </body></html>''' out = '/tmp/workspace/Neurology_Part1_v2.html' with open(out, 'w', encoding='utf-8') as f: f.write(html) kb = os.path.getsize(out)/1024 print(f"Saved: {out}") print(f"Size: {kb:.0f} KB") PYEOF