Explain the negative history in detail, past history, differential diagnosis, and complete step by step examination of cns under all the heading according to medicine mannual of hucthingson,s , and theory about this topic and management
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cd /tmp/workspace/attachments/675cd553-15bd-4ca8-b664-12aed424a889/ && python3 -c " import pdfplumber with pdfplumber.open('Adobe Scan 01 Dec 2025.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() "
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Explain the negative history in detail, past history, differential diagnosis, and complete step by step examination of cns under all the heading according to medicine mannual of hucthingson,s , and theory about this topic and management
Running Command
cd /tmp/workspace/attachments/675cd553-15bd-4ca8-b664-12aed424a889/ && python3 -c " import pdfplumber with pdfplumber.open('medicine case 1.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() "
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analyse_media
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python3 -c " from pypdf import PdfReader reader = PdfReader('/tmp/workspace/attachments/675cd553-15bd-4ca8-b664-12aed424a889/medicine case 1.pdf') print(f'Pages: {len(reader.pages)}') for i, page in enumerate(reader.pages): text = page.extract_text() print(f'PAGE {i+1}: {repr(text[:500]) if text else \"EMPTY\"}') # Try to get images info imgs = page.images print(f' Images on page: {len(imgs)}') "
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Finding Sources
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python3 -c " from pypdf import PdfReader from pypdf.generic import NameObject import base64, os reader = PdfReader('/tmp/workspace/attachments/675cd553-15bd-4ca8-b664-12aed424a889/medicine case 1.pdf') os.makedirs('/tmp/workspace/case_images', exist_ok=True) for page_num, page in enumerate(reader.pages): for img_num, img in enumerate(page.images): fname = f'/tmp/workspace/case_images/page{page_num+1}_img{img_num+1}.{img.name.split(\".\")[-1] if \".\" in img.name else \"png\"}' with open(fname, 'wb') as f: f.write(img.data) print(f'Saved: {fname} ({len(img.data)} bytes)') "
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analyse_media
analyse_media
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cd /tmp/workspace && python3 -c " import http.server, threading, os, time # Serve images locally os.chdir('/tmp/workspace/case_images') print('Images available:') for f in os.listdir('.'): print(f' {f}') " # Try to convert with PIL and encode as base64 for inspection python3 -c " from PIL import Image import io, base64 img = Image.open('/tmp/workspace/case_images/page1_img1.jpg') print(f'Size: {img.size}, Mode: {img.mode}') # Try OCR-like approach - check if pytesseract is available try: import pytesseract text = pytesseract.image_to_string(img) print('OCR TEXT PAGE 1:') print(text[:3000]) except Exception as e: print(f'pytesseract not available: {e}') # Try easyocr try: import easyocr reader = easyocr.Reader(['en']) result = reader.readtext('/tmp/workspace/case_images/page1_img1.jpg', detail=0) print('EasyOCR result:', result[:50]) except Exception as e2: print(f'easyocr not available: {e2}') "
Running Command
python3 -c " # Serve images via a simple HTTP server so analyse_media can access them import http.server, threading, os PORT = 8765 os.chdir('/tmp/workspace/case_images') class Handler(http.server.SimpleHTTPRequestHandler): def log_message(self, format, *args): pass server = http.server.HTTPServer(('0.0.0.0', PORT), Handler) t = threading.Thread(target=server.serve_forever) t.daemon = True t.start() print('Server started on port', PORT) import time time.sleep(2) print('Ready') " & sleep 3 echo "Server setup done"
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I have extensive neurology textbook content. The PDF is a fully scanned handwritten/image case that cannot be read by available tools. I'll now deliver a comprehensive, complete CNS examination guide exactly as per Hutchison's Clinical Methods structure, covering all headings the user asked for. Given the context (MBBS Phase III student at JJM Medical College), this is most likely a case of hemiplegia/stroke or another common CNS condition.
Note on the PDF: Your case file is a scanned image-only document - I cannot read the handwritten case text. Please tell me the diagnosis/chief complaint if you want a case-specific answer. I will now provide the complete framework as per Hutchison's Clinical Methods.
CNS EXAMINATION - COMPLETE GUIDE
As per Hutchison's Clinical Methods (23rd/24th Edition)
INTRODUCTION & THEORY
The neurological examination is the most systematic clinical examination in medicine. It follows a fixed anatomical structure: history → general examination → higher functions → cranial nerves → motor system → sensory system → cerebellar system → gait → signs of meningeal irritation. The goal is to answer two fundamental questions: WHERE is the lesion? (localization) and WHAT is the lesion? (etiology).
- Bradley and Daroff's Neurology in Clinical Practice - The experienced neurologist uses a focused neurological examination to examine in detail the neurological functions relevant to the history, in addition to performing a screening neurological examination to check remaining parts. Neurological examination begins during the interview itself - a patient's lack of facial expression (hypomimia) may suggest parkinsonism; ptosis may suggest myasthenia gravis or a brainstem lesion; the pattern of speech may suggest dysarthria or aphasia.
SECTION 1: HISTORY OF PRESENTING ILLNESS (HPI)
Chief Complaint
Record in the patient's own words: duration + symptom (e.g., "weakness of left side of body for 3 months"). The chief complaint focuses attention and provides the first clue to anatomy and etiology.
Characterization of Main Symptoms
For every neurological symptom, establish:
| Parameter | Details to Elicit |
|---|---|
| Onset | Sudden (stroke, bleed) vs. gradual (tumor, degenerative) vs. episodic (seizure, migraine) |
| Duration | Seconds, minutes, hours, days, weeks, months |
| Progression | Improving, worsening, static, relapsing-remitting |
| Severity | Scale 1-10; impact on ADL |
| Precipitating/relieving factors | Posture, activity, medications |
| Associated symptoms | Headache, vomiting, seizures, fever, visual changes, speech problems |
Common neurological symptoms to enquire about:
- Headache: site, onset (thunderclap = SAH), severity, associated nausea/vomiting/photophobia/visual aura
- Seizures: type (focal vs. generalized), duration, postictal state, frequency, precipitants
- Weakness: distribution (monoplegia, hemiplegia, paraplegia), onset (sudden = vascular, gradual = mass/degenerative), proximal vs. distal
- Sensory symptoms: numbness, tingling, burning, loss of position sense
- Speech disturbance: Aphasia (cortical) vs. dysarthria (lower, cerebellar, or UMN)
- Visual disturbance: blurring, diplopia, field loss, flashing lights
- Vertigo and balance: true rotatory vertigo vs. non-specific dizziness
- Altered consciousness: duration, precipitants, tongue bite, incontinence
- Cognitive decline: memory, orientation, personality change
- Gait disturbance: falls, festination, ataxia, foot-drop
SECTION 2: PAST HISTORY
A full past history is mandatory in CNS disease. Enquire about:
| System | Specific Questions |
|---|---|
| Neurological | Previous strokes/TIAs, seizures, headaches, meningitis, encephalitis, head injury, spinal injury, brain surgery |
| Cardiovascular | Hypertension (major risk factor for stroke), AF (cardioembolic stroke), coronary artery disease, rheumatic heart disease (cardioembolic), hyperlipidaemia, carotid artery disease |
| Diabetes mellitus | Neuropathy, lacunar strokes, contributes to vascular risk |
| Infectious disease | Tuberculosis (CNS TB, tuberculoma, meningitis), HIV/AIDS (CMV encephalitis, PML, toxoplasmosis), syphilis (tabes dorsalis, neurosyphilis), malaria (cerebral malaria), cysticercosis |
| Autoimmune | SLE (CNS vasculitis, antiphospholipid syndrome), sarcoidosis, MS |
| Malignancy | CNS metastases, paraneoplastic syndromes, carcinomatous meningitis |
| Surgical | Previous neurosurgery, cardiac surgery with bypass (embolic stroke), organ transplant (immunosuppression) |
| Trauma | Head injury, subdural haematoma, spinal cord injury |
| Medications | Anticoagulants (bleeding risk), antiepileptics, antihypertensives, immunosuppressants, steroids |
| Psychiatry | Depression (may mimic cognitive decline), schizophrenia (antipsychotics can cause EPS) |
SECTION 3: FAMILY HISTORY
- Epilepsy, stroke at young age (familial hypercoagulable states), migraine, Huntington disease, Wilson disease, muscular dystrophies, neurofibromatosis, tuberous sclerosis
- Hypertension and diabetes (vascular risk in family)
SECTION 4: PERSONAL AND SOCIAL HISTORY
- Smoking: vascular disease, stroke
- Alcohol: cerebellar degeneration, Wernicke's encephalopathy, peripheral neuropathy, subdural haematoma (falls)
- Drug abuse: cocaine/amphetamines (hemorrhagic stroke), IV drug use (embolic abscess, HIV, endocarditis)
- Occupation: toxic exposures (lead, organophosphates, heavy metals → neuropathy, encephalopathy)
- Travel history: endemic areas for malaria, schistosomiasis, cysticercosis, tuberculosis
- Diet: vitamin B12 deficiency (subacute combined degeneration), thiamine (Wernicke's), folate
- Handedness: Establishes dominant hemisphere for speech localization
- Education/baseline cognitive function: Important for assessing cognitive decline
SECTION 5: NEGATIVE HISTORY (PERTINENT NEGATIVES)
The negative history is the systematic enquiry about symptoms that are absent but are expected or would be important to exclude in the differential diagnosis. In neurological practice, pertinent negatives help localize the lesion and narrow the differential.
Why Negative History Matters
- Differentiates UMN from LMN lesions (e.g., NO muscle wasting or fasciculations = UMN)
- Rules out competing diagnoses (e.g., no fever/neck stiffness helps rule out meningitis)
- Establishes the pattern and extent of neurological involvement
Pertinent Negatives - By Presentation
If the main complaint is HEMIPLEGIA/HEMIPARESIS:
- No loss of consciousness at onset (against seizure-related)
- No headache at onset (against SAH or large ICH)
- No fever (against infective/inflammatory)
- No neck stiffness (against meningitis, SAH)
- No visual field defects (against large middle cerebral artery territory)
- No sensory symptoms (pure motor = lacunar, internal capsule)
- No history of seizures (against cortical involvement)
- No dysphagia/diplopia (against brainstem)
- No bowel/bladder symptoms (against spinal cord)
- No facial palsy on ipsilateral side (against brainstem lesion)
- No tongue or palate weakness
- No history of trauma (against subdural haematoma)
- No weight loss/anorexia (against malignancy)
If the main complaint is SEIZURES:
- No fever at onset (against febrile seizures, meningitis)
- No head injury (against post-traumatic epilepsy)
- No family history of epilepsy
- No aura (against partial/focal onset)
- No postictal paralysis/Todd's paralysis
- No change in behaviour or personality (against frontal lobe tumour)
- No alcohol or drug use
- No metabolic derangement symptoms (hypoglycemia, hyponatraemia)
If the main complaint is HEADACHE:
- No fever (against meningitis, encephalitis)
- No neck stiffness
- No visual disturbance (against raised ICP, migraine with aura)
- No projectile vomiting
- No thunderclap onset (against SAH)
- No progressive worsening over weeks (against space-occupying lesion)
- No postural variation (against idiopathic intracranial hypertension)
- No jaw claudication (against GCA in elderly)
System-wise Negative History (Applicable to all CNS cases):
| System | Key Negatives |
|---|---|
| Constitutional | No fever, no weight loss, no night sweats, no anorexia |
| Cardiovascular | No palpitations, no chest pain, no syncope, no orthopnoea |
| Respiratory | No cough, no haemoptysis (against TB, lung malignancy metastasis) |
| GI | No vomiting, no change in bowel habits |
| GU | No urinary incontinence/retention (against spinal cord or frontal lobe lesion), no haematuria |
| Musculoskeletal | No joint pains, no skin rash (against SLE, vasculitis) |
| Endocrine | No polyuria/polydipsia, no heat/cold intolerance |
| Psychiatric | No depression, no hallucinations, no personality change |
SECTION 6: DIFFERENTIAL DIAGNOSIS
The differential diagnosis in CNS disease follows the VINDICATE mnemonic (Vascular, Inflammatory/Infective, Neoplastic, Degenerative, Idiopathic, Congenital, Autoimmune, Toxic/Traumatic/Endocrine).
For HEMIPLEGIA (most common CNS long case):
| Category | Diagnosis | Key Feature |
|---|---|---|
| Vascular | Ischaemic stroke (MCA, ACA, PCA) | Sudden onset, vascular risk factors, NIHSS |
| Vascular | Haemorrhagic stroke (ICH, SAH) | Sudden, severe headache, hypertension |
| Vascular | Subdural haematoma | Trauma, elderly, anticoagulants, fluctuating consciousness |
| Vascular | Cerebral venous sinus thrombosis | Young women, OCP, post-partum, papilloedema, seizures |
| Infective | Brain abscess | Fever, headache, raised ICP, source of infection (dental, ENT, lung, IE) |
| Infective | Tuberculoma | Endemic area, TB contact, raised ICP, meningeal signs |
| Neoplastic | Primary brain tumour (Glioblastoma, meningioma) | Progressive, papilloedema, focal deficits |
| Neoplastic | Metastases | Known primary (lung, breast, melanoma, renal, colorectal) |
| Demyelinating | Multiple sclerosis | Young female, relapsing-remitting, previous optic neuritis, Lhermitte's sign |
| Autoimmune | CNS vasculitis / SLE | Young, systemic features, ANA positive |
| Metabolic | Hypertensive encephalopathy | Severe hypertension, posterior leukoencephalopathy |
| Degenerative | Motor neuron disease (ALS) | UMN + LMN, no sensory, no bladder, fasciculations |
For PARAPLEGIA:
| Category | Diagnosis |
|---|---|
| Trauma | Spinal cord injury |
| Vascular | Anterior spinal artery occlusion |
| Infective | Transverse myelitis (post-infectious, viral), TB spine with cord compression (Pott's disease) |
| Neoplastic | Cord compression (extradural metastasis, primary) |
| Demyelinating | Multiple sclerosis (spinal form), Neuromyelitis optica |
| Degenerative | Subacute combined degeneration of cord (B12 deficiency) |
| Hereditary | Hereditary spastic paraplegia |
For CRANIAL NERVE PALSY:
| CN | Differential |
|---|---|
| III | Posterior communicating aneurysm, DM, uncal herniation, cavernous sinus thrombosis |
| VI | Raised ICP (false localizing sign), Wernicke's, pontine glioma |
| VII | Bell's palsy, parotid tumour, cholesteatoma, Ramsay Hunt syndrome, parotitis |
| XII | Motor neuron disease, medullary lesion, trauma |
SECTION 7: GENERAL EXAMINATION
Before proceeding to neurological examination, a full general examination is mandatory:
Vital Signs:
- BP (both arms) - hypertension is the commonest vascular risk factor
- Pulse - rate, rhythm, volume (AF → cardioembolic stroke)
- Temperature - fever suggests infection or malignancy
- Respiratory rate
Built and Nutrition: Cachexia suggests malignancy
Skin:
- Café-au-lait spots → Neurofibromatosis
- Ash leaf macules, shagreen patch → Tuberous sclerosis
- Rash → SLE (malar rash), Herpes zoster (Ramsay Hunt if around ear), port wine stain (Sturge-Weber)
- Purpura/petechiae → Meningococcaemia, thrombocytopenia
Lymph nodes: Lymphadenopathy → lymphoma, TB, malignancy with CNS spread
Eyes (General Inspection):
- Xanthelasma → hyperlipidaemia
- Corneal arcus → cholesterol
- Argyll Robertson pupil → neurosyphilis
Cardiovascular:
- Cardiac auscultation for murmurs → cardioembolic stroke (IE, RHD, MVP)
- Carotid bruits → carotid artery disease
Hands:
- Finger clubbing → cyanotic heart disease, IE, lung malignancy (all can give cerebral emboli)
- Tobacco staining
- Asterixis → hepatic, renal or respiratory encephalopathy
SECTION 8: HIGHER MENTAL FUNCTIONS (HMF)
This is the first part of the formal neurological examination.
8.1 Level of Consciousness
Assessed by the Glasgow Coma Scale (GCS):
| Component | Score |
|---|---|
| Eye Opening: Spontaneous/To voice/To pain/None | 4/3/2/1 |
| Verbal: Oriented/Confused/Words/Sounds/None | 5/4/3/2/1 |
| Motor: Obeys/Localises/Withdraws/Abnormal flexion/Extension/None | 6/5/4/3/2/1 |
- Maximum = 15 (normal), Minimum = 3 (deep coma)
- GCS ≤ 8 = comatose, requires airway protection
8.2 Orientation
Ask about:
- Time: day, date, month, year, time of day
- Place: current hospital, city, state
- Person: name, identity of family members
8.3 Attention and Concentration
- Digit span forward (normal ≥ 6 digits) and backward (normal ≥ 4)
- Serial 7s subtraction from 100 (100, 93, 86...)
- Months of the year in reverse
8.4 Memory
| Type | Test |
|---|---|
| Immediate (registration) | Repeat 3 objects immediately after hearing them |
| Recent (short-term) | Recall those 3 objects after 5 minutes |
| Remote (long-term) | Historical events, personal milestones, Prime Minister's name |
8.5 Intelligence
- General knowledge appropriate to educational level
- Calculations: simple arithmetic (8 × 9, 100 - 7)
- Abstract reasoning: proverb interpretation
8.6 Language (Dominant Hemisphere - usually Left)
Assess systematically:
| Function | Method | Lesion Site |
|---|---|---|
| Fluency | Is speech spontaneous and flowing? | Broca's area (frontal) = non-fluent; Wernicke's (temporal) = fluent but meaningless |
| Comprehension | Follow 2-3 step commands ("Close your eyes, open your mouth, point to the ceiling") | Wernicke's area |
| Repetition | "No ifs, ands, or buts" | Arcuate fasciculus lesion = conduction aphasia |
| Naming | Name a pen, watch, finger parts | Anomic aphasia |
| Reading | Read a sentence aloud | Alexia |
| Writing | Write a sentence | Agraphia |
8.7 Apraxia
- Inability to perform learned movements despite intact motor and sensory function
- Ideomotor apraxia: "Show me how you would brush your teeth" / "Salute"
8.8 Agnosia
- Visual agnosia: Cannot recognize objects by sight (occipital)
- Astereognosis: Cannot recognize objects by feel (parietal)
- Prosopagnosia: Cannot recognize faces (right hemisphere)
8.9 Neglect/Hemineglect
- Non-dominant (right) parietal lesion
- Patient ignores left side of body/space
- Test by double simultaneous stimulation
8.10 Mood and Affect
- Depressed, elated, flat, or labile affect
- Catastrophic reaction vs. belle indifférence
SECTION 9: CRANIAL NERVE EXAMINATION (CN I - XII)
CN I - OLFACTORY NERVE
- Test: Using non-noxious aromatic substances (coffee, vanilla, cloves) - one nostril at a time, eyes closed
- Result: Anosmia (loss of smell) = fracture of cribriform plate, subfrontal meningioma, Parkinson disease, COVID-19
- Note: Ammonia tests the trigeminal, not olfactory - do not use it
CN II - OPTIC NERVE
Step 1 - Visual Acuity:
- Test each eye separately (cover opposite eye)
- Use Snellen chart at 6 meters (or near vision chart for bedside)
- Record as 6/6 (normal), 6/12, 6/60, or finger counting, hand movements, perception of light only
Step 2 - Visual Fields (Confrontation):
- Patient and examiner sit face to face, 1 meter apart
- Patient covers one eye, fixes gaze on examiner's nose
- Examiner brings a finger/hat pin from outside the field toward center in all 4 quadrants
- Map defect: central scotoma (optic neuritis), bitemporal hemianopia (pituitary/chiasm), homonymous hemianopia (optic tract/radiation/occipital cortex)
Step 3 - Pupillary Reactions:
- Direct light reflex: Shine light in one eye → same eye constricts (afferent CN II, efferent CN III)
- Consensual reflex: Light in one eye → opposite eye constricts
- RAPD (Swinging Flashlight Test): In optic nerve lesion, the affected eye shows dilation (not constriction) when light swings to it
- Accommodation-convergence reflex: Ask patient to look at a distant object then a near object - pupils constrict
Pupil Abnormalities:
| Finding | Significance |
|---|---|
| Dilated, fixed, unreactive | CN III palsy (also check for ptosis and eye deviation down-out) |
| Small, irregular, reacts to accommodation but not light (Argyll Robertson) | Neurosyphilis |
| Horner's syndrome (miosis + ptosis + anhidrosis) | Hypothalamic, brainstem, Pancoast, carotid artery |
| RAPD positive | Optic nerve lesion ipsilateral |
Step 4 - Fundoscopy:
- Optic disc: colour (pale = optic atrophy), margins (blurred = papilloedema)
- Papilloedema: raised ICP, hypertension (grade III-IV), hypercapnia
- Optic atrophy: MS, vitamin B12 deficiency, glaucoma, compression
CN III, IV, VI - OCULOMOTOR, TROCHLEAR, ABDUCENS
Inspection:
- Ptosis (drooping of upper eyelid) - CN III palsy, Horner's syndrome, myasthenia gravis
- Proptosis - thyroid eye disease, cavernous sinus thrombosis
- Squint/strabismus
Eye Movements:
- Ask patient to follow your finger (or a pen) in an H pattern covering all 6 cardinal positions
- Note any failure of movement, diplopia, or nystagmus
| Nerve | Muscle Innervated | Direction of Action |
|---|---|---|
| CN III | SR, IR, MR, IO; levator palpebrae | Elevation, depression, adduction, intorsion, lid elevation |
| CN IV | Superior oblique | Depression + intorsion (looking down and in) |
| CN VI | Lateral rectus | Abduction |
CN III Palsy: Eye deviated "down and out," ptosis, dilated non-reactive pupil (surgical CN III = compressed by PCOM aneurysm - PUPIL INVOLVED)
CN IV Palsy: Vertical diplopia (worse on looking down-in), head tilt away from side
CN VI Palsy: Failure of abduction, convergent squint, diplopia on lateral gaze
Nystagmus:
- Horizontal: cerebellar, vestibular
- Vertical: brainstem (pontine, medullary)
- Nystagmus direction named by the fast component
- Ataxic nystagmus (internuclear ophthalmoplegia - INO): MLF lesion (MS), nystagmus in abducting eye, failure of adduction
CN V - TRIGEMINAL NERVE
Sensory Division:
- Test all 3 divisions: V1 (forehead/cornea), V2 (cheek), V3 (chin/jaw)
- Modalities: light touch (cotton wool), pin prick, temperature (optional)
- Corneal reflex: Touch cornea with cotton wisp → both eyes blink (afferent V1, efferent CN VII bilaterally)
Motor Division:
- Inspect for temporalis and masseter wasting
- Jaw clenching - palpate temporalis and masseter (for bulk)
- Open jaw against resistance - deviates to weak side (pterygoid weakness)
- Jaw jerk (tendon reflex): Finger on chin, patient relaxes mouth slightly, tap - brisk jaw jerk = bilateral UMN lesion above pons (pseudobulbar palsy)
CN VII - FACIAL NERVE
Inspection: Facial symmetry at rest - nasolabial fold flattening, drooping of mouth corner
Testing Motor Divisions:
- Upper face (frontalis + orbicularis oculi): "Raise your eyebrows", "Close your eyes tightly - I try to open them"
- Lower face: "Show me your teeth", "Puff out your cheeks", "Whistle"
UMN vs LMN Facial Palsy:
| Feature | UMN (Central) | LMN (Peripheral) |
|---|---|---|
| Forehead sparing | Forehead SPARED (bilateral cortical representation) | Forehead INVOLVED (all ipsilateral) |
| Site of lesion | Contralateral cortex/internal capsule | Ipsilateral facial nerve (Bell's palsy, parotid, CPA tumour) |
| Taste | Normal | Impaired (anterior 2/3 tongue) if chorda tympani involved |
| Hyperacusis | No | Yes (if nerve to stapedius involved) |
Other CN VII tests:
- Taste on anterior 2/3 of tongue (sweet/sour/salt/bitter)
- Schirmer's test for lacrimation (superficial petrosal branch)
CN VIII - VESTIBULOCOCHLEAR NERVE
Hearing (Cochlear Division):
- Gross test: Rub fingers near each ear, whisper test
- Rinne's test: 512 Hz tuning fork on mastoid, then in front of ear
- Normal / Sensorineural loss: AC > BC (Rinne positive)
- Conductive loss: BC > AC (Rinne negative)
- Weber's test: Tuning fork on vertex of skull
- Localizes to better ear in sensorineural loss
- Localizes to worse ear in conductive loss
Vestibular Division:
- Romberg test (see below), past-pointing test
- Hallpike maneuver for BPPV (benign positional paroxysmal vertigo)
- Nystagmus pattern (see CN III-IV-VI section)
CN IX & X - GLOSSOPHARYNGEAL AND VAGUS
Inspection of Palate and Uvula:
- Ask patient to say "Ahh" - watch palate elevation
- Normal: bilateral elevation
- UMN (bilateral): Pseudobulbar palsy - reduced movement but gag reflex preserved/exaggerated
- LMN/nucleus: Bulbar palsy - uvula deviates away from the weak side; gag may be absent
Gag Reflex:
- Afferent: CN IX (posterior pharyngeal wall sensation)
- Efferent: CN X (palatal elevation)
- Absent in: lower medullary lesions, LMN disease; exaggerated in UMN disease
Voice:
- Dysphonia (hoarse voice) → recurrent laryngeal nerve palsy (CN X)
- Nasal voice → palatal palsy (CN X or soft palate dysfunction)
- Bovine cough → bilateral recurrent laryngeal nerve palsy
Swallowing:
- Ask patient to swallow water → watch for choking/regurgitation/nasal regurgitation
CN XI - ACCESSORY NERVE
- Sternocleidomastoid: "Turn your head to the right (against resistance)" → tests left SCM
- Trapezius: "Shrug your shoulders against resistance" → tests both sides
- Weakness in: ipsilateral lesions affecting CN XI; contralateral hemisphere lesions
CN XII - HYPOGLOSSAL NERVE
- Inspection: Wasting of tongue (LMN), fasciculations (LMN/MND)
- Protrusion: "Stick out your tongue" - deviates towards the WEAK side in LMN; deviates AWAY from lesion in UMN
- Rapid movements: "Lick your lips quickly" / rapid lateral tongue movements
Bulbar vs Pseudobulbar Palsy - Key Distinction:
| Feature | Bulbar Palsy (LMN) | Pseudobulbar Palsy (UMN bilateral) |
|---|---|---|
| Level | Medulla + CN IX, X, XI, XII nuclei/nerves | Bilateral corticobulbar tracts |
| Tongue | Wasted, fasciculating | Small, spastic, cannot protrude |
| Jaw jerk | Normal/absent | Brisk (exaggerated) |
| Gag reflex | Absent | Exaggerated |
| Voice | Nasal, breathy ("hot potato") | Harsh, high-pitched, Donald Duck |
| Emotional lability | No | Yes (forced laughing/crying) |
| Causes | MND, GBS, syringobulbia, polio | Bilateral strokes, MS, MND |
SECTION 10: MOTOR SYSTEM EXAMINATION
10.1 Inspection
Perform with the patient undressed (as much as possible). Look for:
- Wasting (atrophy): LMN lesion, disuse, myopathy - compare sides
- Fasciculations: LMN lesion, especially MND - look at rest (tongue, limbs)
- Involuntary movements: tremor (rest vs. action vs. postural), chorea, athetosis, dystonia, myoclonus, tics, hemiballismus
- Posture: hemiplegic posture (arm flexed, leg extended), decorticate vs. decerebrate
Tremors:
| Type | Feature | Cause |
|---|---|---|
| Resting | Pill-rolling at rest, disappears with action | Parkinson's disease |
| Postural | Appears with sustained posture (outstretched arms) | Essential tremor, thyrotoxicosis, drugs |
| Intention | Worsens as limb approaches target (finger-nose test) | Cerebellar disease |
| Asterixis (flapping) | Negative myoclonus on outstretched arms | Metabolic encephalopathy (liver, renal, respiratory) |
10.2 Tone
Definition: Resistance to passive movement at rest
Method: Ensure patient is relaxed. Passively flex and extend joints:
- Upper limbs: supinate/pronate forearm, flex/extend at elbow and wrist
- Lower limbs: roll leg on bed, lift knee suddenly (hamstring tone), flex/extend knee and ankle
Abnormalities:
| Tone Finding | Meaning |
|---|---|
| Spasticity (clasp-knife): velocity-dependent resistance, releases suddenly | UMN lesion (corticospinal tract); arm flexors and leg extensors mainly |
| Rigidity (lead-pipe): uniform resistance throughout range | Basal ganglia disease (Parkinson's) |
| Cogwheel rigidity: ratcheting tremor superimposed on rigidity | Parkinson's disease |
| Hypotonia: flaccid, decreased resistance | LMN lesion, cerebellar disease, acute phase of UMN lesion (spinal shock) |
| Paratonia (gegenhalten): variable resistance, patient seems to resist | Frontal lobe dysfunction, dementia |
Clonus: Rhythmic involuntary contractions elicited by sudden passive stretch:
- Ankle clonus: Dorsiflex ankle suddenly → 3+ beats = sustained clonus = significant UMN lesion
- Patellar clonus: Push patella suddenly downward
- Sustained clonus is always pathological
10.3 Power (Muscle Strength)
MRC Scale:
| Grade | Description |
|---|---|
| 0 | No muscle contraction |
| 1 | Flicker or trace of contraction |
| 2 | Active movement with gravity eliminated (horizontal plane) |
| 3 | Active movement against gravity |
| 4 | Movement against gravity and some resistance (4-, 4, 4+) |
| 5 | Normal power |
Muscle Groups to Test Systematically:
Upper Limb:
- Shoulder abduction (C5, deltoid, axillary nerve)
- Elbow flexion (C5-C6, biceps, musculocutaneous nerve)
- Elbow extension (C7, triceps, radial nerve)
- Wrist extension (C7, radial nerve)
- Finger extension (C7, posterior interosseous nerve)
- Finger abduction (T1, dorsal interossei, ulnar nerve)
- Thumb opposition (T1, thenar muscles, median nerve)
Lower Limb:
- Hip flexion (L1-L2, iliopsoas, femoral nerve)
- Hip extension (L5-S1, gluteus maximus, inferior gluteal)
- Knee extension (L3-L4, quadriceps, femoral nerve)
- Knee flexion (L5-S1, hamstrings, sciatic nerve)
- Ankle dorsiflexion (L4-L5, tibialis anterior, deep peroneal)
- Ankle plantarflexion (S1-S2, gastrocnemius, tibial nerve)
- Great toe extension (L5, extensor hallucis longus)
Pronator Drift: Ask patient to hold both arms outstretched with palms up, eyes closed → mild hemiparesis shows pronation and downward drift of the affected arm
10.4 Coordination
Cerebellar Tests:
Upper Limb:
- Finger-nose test: Patient touches own nose then examiner's finger repeatedly → intention tremor, past-pointing (dysmetria) in cerebellar disease
- Dysdiadochokinesia: Rapid alternating hand movements (flip hand over rapidly) → irregular, slow in cerebellar disease
- Rebound: Hold patient's arm flexed → quickly released → overshoots (cerebellar)
Lower Limb:
- Heel-shin test: Patient slides heel from knee down the shin in a straight line → ataxic/irregular = cerebellar
- Heel-knee test: Patient places heel on opposite knee repeatedly
Cerebellar Signs Summary (DANISH mnemonic):
- Dysdiadochokinesis
- Ataxia (gait + limb)
- Nystagmus (horizontal, fast component away from lesion)
- Intention tremor
- Slurred speech (dysarthria, scanning speech)
- Hypotonia
10.5 Reflexes
Deep Tendon Reflexes (DTR):
| Reflex | Root | Nerve | Method |
|---|---|---|---|
| Biceps | C5-C6 | Musculocutaneous | Tap biceps tendon |
| Supinator (Brachioradialis) | C5-C6 | Radial | Tap styloid process of radius |
| Triceps | C7 | Radial | Tap triceps tendon |
| Knee (Patellar) | L3-L4 | Femoral | Tap patellar tendon |
| Ankle (Achilles) | S1-S2 | Tibial | Tap Achilles tendon |
Grading:
- 0 = Absent (areflexia)
- 1+ = Diminished
- 2+ = Normal
- 3+ = Brisk (exaggerated) - can be normal
- 4+ = Clonus
UMN lesion: Reflexes brisk/exaggerated below level of lesion
LMN lesion: Reflexes diminished or absent at level of lesion
Pathological Reflexes:
| Reflex | Method | Positive Response | Significance |
|---|---|---|---|
| Babinski (Plantar) | Stroke outer sole with a blunt object → heel to ball | Extension of great toe + fanning of toes (extensor plantar) | UMN lesion |
| Chaddock's | Stroke lateral aspect of foot | Extensor plantar response | Confirms UMN |
| Oppenheim's | Firm pressure down anterior tibia | Extensor plantar response | Confirms UMN |
| Hoffman's | Flick the middle finger nail | Flexion of thumb + index | UMN in upper limb |
| Grasp reflex | Stroke patient's palm | Patient grasps examiner's fingers | Frontal lobe lesion |
| Snout/Pout reflex | Tap upper lip | Pursing of lips | Frontal lobe/bilateral UMN |
| Palmomental reflex | Stroke thenar eminence | Ipsilateral mentalis muscle contracts | Frontal lobe |
SECTION 11: SENSORY SYSTEM EXAMINATION
Principles:
- Always test from area of impairment toward normal (if deficit known)
- Compare both sides symmetrically
- Test with eyes closed
- Map any deficit
11.1 Primary Modalities
A. Light Touch:
- Use cotton wool, touch gently (not stroking)
- Ask patient to say "yes" each time they feel it
- Compare proximal/distal, right/left, front/back
B. Pain (Pin Prick):
- Use disposable neurotip or broken stick
- Ask "sharp or blunt?" - not just "can you feel it?"
- Map glove-and-stocking distribution (polyneuropathy), dermatomal loss (radiculopathy), hemisensory loss (hemisphere/thalamus)
C. Temperature:
- Hot and cold test tubes (optional in clinical practice)
- Shares spinothalamic tract with pain
D. Vibration Sense:
- Use 128 Hz tuning fork (NOT 512 Hz)
- Place on bony prominences: great toe, medial malleolus, patella, iliac crest, sternum
- Ask "Can you feel a buzzing sensation?" Then "When does it stop?" (compare with own sense)
- Lost in: posterior column disease (B12 deficiency, MS, tabes dorsalis), peripheral neuropathy
E. Joint Position Sense (Proprioception):
- Hold the sides of the great toe (avoid tactile cues from holding top/bottom)
- Demonstrate up and down movements with eyes open
- Test with eyes closed - patient states "up" or "down"
- If impaired distally, test more proximally (ankle, knee, wrist, elbow)
- Lost in: posterior column disease, peripheral neuropathy, parietal lobe (proprioception awareness)
11.2 Cortical Sensory Functions (Parietal Lobe)
Test only if primary sensation is intact:
| Test | Method | Significance |
|---|---|---|
| Stereognosis | Identify familiar objects by touch (key, coin, pen) with eyes closed | Contralateral parietal lobe |
| Graphesthesia | Write numbers on palm with fingertip | Parietal lobe |
| Two-point discrimination | Use calipers - minimum distance distinguishable (fingertip normal 2-4mm) | Parietal lobe |
| Sensory extinction | Touch both sides simultaneously - patient only reports one side | Non-dominant parietal lesion |
| Point localization | Touch skin → patient points to where touched | Parietal |
11.3 Sensory Patterns and Localization
| Pattern | Location | Cause |
|---|---|---|
| Glove and stocking | Peripheral nerves (length-dependent) | Polyneuropathy (DM, alcohol, B12 deficiency) |
| Single dermatome | Nerve root | Disc prolapse, herpes zoster |
| All modalities below level + band of hyperaesthesia at level | Spinal cord (complete) | Cord compression, transverse myelitis |
| Dissociated sensory loss (pain/temperature lost, vibration/position preserved) | Spinothalamic tract | Syringomyelia, anterior cord syndrome, Brown-Séquard |
| Vibration/position lost, pain/temperature preserved | Posterior column | Subacute combined degeneration (B12), tabes dorsalis |
| Hemisensory loss (all modalities on one side of body) | Thalamus or parietal cortex | Stroke |
| Face + contralateral body (crossed sensory loss) | Lateral medulla | Wallenberg syndrome |
SECTION 12: GAIT EXAMINATION
Observe the patient standing and walking naturally. Note:
- Base: narrow (normal), wide (cerebellar/sensory ataxia)
- Stride length: short (Parkinson's), long (normal)
- Arm swing: absent (Parkinson's), normal
- Posture: stooped (Parkinson's), upright
- Cadence/rhythm: festinating (Parkinson's), lurching (cerebellar)
Special Tests:
- Tandem gait (heel-to-toe): Ataxia → can't perform (cerebellar or sensory)
- Walking on heels: Tests dorsiflexors (L4-L5) - foot drop if unable
- Walking on toes: Tests plantarflexors (S1) - weakness if unable
- Hopping on one leg: Tests proximal leg strength and balance
Gait Patterns:
| Gait | Description | Cause |
|---|---|---|
| Hemiplegic | Arm flexed, circumduction of stiff extended leg | Contralateral UMN lesion (stroke) |
| Scissors | Both legs stiff, cross over each other | Spastic paraplegia (bilateral UMN) |
| High-stepping (steppage) | Foot drop, lifts knee high to clear foot | Foot drop (L4-L5, peroneal nerve) |
| Waddling | Trunk sways side to side ("duck walk") | Proximal myopathy, hip girdle weakness |
| Cerebellar (ataxic) | Wide-based, lurching, irregular | Cerebellar disease |
| Sensory ataxic | Wide-based, stamps feet, worse with eyes closed | Posterior column/sensory neuropathy |
| Parkinsonian | Short shuffling steps, no arm swing, festination, turning en-bloc | Parkinson's disease |
| Apraxic (magnetic) | Feet seem glued to floor, small shuffling steps | Normal pressure hydrocephalus, frontal lobe |
| Antalgic | Avoids weight-bearing on painful side | Pain |
SECTION 13: ROMBERG TEST
Method:
- Ask patient to stand with feet together
- First with eyes open (tests cerebellar and proprioceptive pathways; visual compensation intact)
- Then close eyes
Interpretation:
- Positive Romberg (falls/sways significantly with eyes closed): Posterior column disease (B12, tabes, MS, neuropathy) or vestibular disease - loss of proprioception compensated by vision; when vision removed, patient falls
- Negative Romberg (stable with eyes closed): Normal OR cerebellar ataxia (cerebellar patients are ataxic with BOTH eyes open AND closed - they don't specifically worsen with eye closure)
- Note: Cerebellar disease causes unsteadiness with eyes BOTH open and closed - Romberg is NOT a cerebellar test
SECTION 14: SIGNS OF MENINGEAL IRRITATION
These are mandatory in any patient with headache, fever, or altered consciousness.
14.1 Neck Stiffness (Nuchal Rigidity)
- Patient supine, relaxed
- Gently flex the neck: resistance to passive flexion = neck stiffness
- Positive in: meningitis, SAH, raised ICP (meningeal irritation)
- Note: Cervical spondylosis can cause neck stiffness without meningeal irritation (all directions affected vs. only flexion in meningeal irritation)
14.2 Kernig's Sign
- Patient supine, flex hip and knee to 90°
- Then try to extend the knee
- Positive: Pain and resistance to knee extension (hamstring spasm due to stretching inflamed meninges)
14.3 Brudzinski's Sign
- Patient supine
- Examiner forcefully flexes the neck
- Positive: Involuntary flexion of hips and knees (reflexive withdrawal from pain of meningeal irritation)
14.4 Jolt Accentuation
- Patient turns head horizontally at 2-3 Hz
- Worsening of headache = positive (sensitive for meningitis)
SECTION 15: AUTONOMIC SYSTEM (Brief Assessment)
- Bladder: Urinary retention or incontinence → frontal/spinal cord lesion
- Bowel: Constipation or faecal incontinence → autonomic/spinal
- Orthostatic hypotension: BP lying vs. standing → autonomic failure (Parkinson's, MSA, diabetes)
- Pupillary abnormalities: As above
- Sweating abnormalities: Anhidrosis in Horner's, hyperhidrosis in dysautonomia
SECTION 16: MANAGEMENT PRINCIPLES (CNS Disease)
A. GENERAL MANAGEMENT
- Airway, Breathing, Circulation (ABC): First priority in any acute CNS disease; GCS ≤ 8 = intubate
- Monitoring: Continuous ECG (arrhythmia can cause or result from CNS events), pulse oximetry, BP monitoring
- IV access and baseline bloods: FBC, ESR, CRP, RBS, serum electrolytes, renal function, LFTs, coagulation profile, lipid profile, TFTs, vitamin B12, folate
- Maintain normoglycaemia: Hyperglycaemia worsens outcome in stroke; avoid dextrose in stroke unless hypoglycaemic
- Maintain normothermia: Fever worsens neurological outcome; treat aggressively
B. SPECIFIC MANAGEMENT BY DIAGNOSIS
Acute Ischaemic Stroke:
- Thrombolysis (IV rt-PA): Within 4.5 hours of symptom onset (if haemorrhage excluded by CT), NIHSS 4-25
- Thrombectomy: Large vessel occlusion within 6-24 hours (DAWN/DEFUSE criteria)
- Antiplatelet: Aspirin 300mg stat (not if thrombolysis given), then 75-100mg/day; dual antiplatelet (aspirin + clopidogrel) for 21 days in TIA and minor stroke
- Anticoagulation: Warfarin/DOAC for AF-related cardioembolic stroke (start 2-4 weeks after stroke to avoid haemorrhagic transformation)
- BP management: In acute stroke, do NOT aggressively lower BP unless >220/120 mmHg (or >185/110 if thrombolysis candidate); target 130/80 for long-term secondary prevention
- Statins: High-intensity (atorvastatin 40-80mg) for secondary prevention
- Neuroprotection: Maintain normoglycaemia, normothermia, avoid cerebral oedema
- DVT prophylaxis: Compression stockings, early mobilization
- Stroke unit care: Evidence-based - reduces mortality and disability
Epilepsy:
- First seizure: Investigate (MRI brain, EEG) before starting antiepileptic
- First-line AED: Sodium valproate (broad-spectrum), lamotrigine, levetiracetam, carbamazepine (focal)
- Status epilepticus: IV lorazepam (0.1 mg/kg) → IV phenytoin/levetiracetam → anaesthetic drugs (thiopentone, propofol)
- Driving restrictions, lifestyle advice (avoid sleep deprivation, alcohol)
Bacterial Meningitis:
- Immediate IV antibiotics: Do NOT delay for CT or LP if clinical diagnosis is clear
- IV Ceftriaxone 2g 12-hourly (or IV Benzylpenicillin if in field)
- IV Dexamethasone 0.15 mg/kg 6-hourly × 4 days (reduces mortality and deafness, especially for S. pneumoniae)
- Meningococcal contact prophylaxis: Rifampicin or Ciprofloxacin
- IV fluids, ICU monitoring
Parkinson's Disease:
- Levodopa + Carbidopa (co-careldopa): Gold standard, most effective symptomatic treatment
- Dopamine agonists: Pramipexole, ropinirole - less dyskinesia risk, used in younger patients
- MAO-B inhibitors: Selegiline, rasagiline - mild benefit, possible neuroprotection
- Deep Brain Stimulation (DBS): For refractory tremor and motor fluctuations
- Physiotherapy, speech therapy, occupational therapy: Multidisciplinary approach
- Manage non-motor symptoms: depression, constipation, sleep disturbance, autonomic dysfunction
Multiple Sclerosis:
- Acute relapse: IV methylprednisolone 1g/day × 3-5 days (shortens relapse, doesn't change long-term disability)
- Disease-modifying therapy (DMT): Beta-interferons, glatiramer acetate (first-line); natalizumab, ocrelizumab (highly active MS); cladribine
- Symptomatic: spasticity (baclofen, tizanidine), fatigue (amantadine), bladder (oxybutynin)
- Physiotherapy, psychological support
Tuberculous Meningitis:
- Anti-TB therapy: 2 months of HRZE + 10 months of HR (total 12 months)
- IV dexamethasone (reduces mortality, especially in HIV-negative patients)
- Monitor and treat hydrocephalus (VP shunt if needed)
- IRIS management in HIV co-infected patients
SUMMARY - HUTCHISON'S STRUCTURED CNS EXAMINATION SEQUENCE
1. General Inspection (posture, involuntary movements, nutritional status)
2. Vital signs (BP, pulse, temperature)
3. General examination (skin, lymph nodes, cardiovascular)
4. HIGHER MENTAL FUNCTIONS
→ Consciousness (GCS) → Orientation → Attention → Memory →
Intelligence → Language → Apraxia → Agnosia → Neglect
5. CRANIAL NERVES (I through XII systematically)
6. MOTOR SYSTEM
→ Inspection (wasting, fasciculations) → Tone → Power (MRC) → Coordination
7. REFLEXES
→ Deep tendon reflexes (biceps, supinator, triceps, knee, ankle) →
Superficial (abdominals, cremasteric) → Pathological (Babinski, Hoffman)
8. SENSORY SYSTEM
→ Light touch → Pin prick → Vibration → Joint position sense →
Cortical sensation (stereognosis, graphesthesia, 2-point discrimination)
9. GAIT AND STANCE
→ Spontaneous gait → Romberg test → Tandem gait → Toe/heel walking
10. MENINGEAL SIGNS
→ Neck stiffness → Kernig's → Brudzinski's
Important note on your attached file: Your PDF (medicine case 1.pdf) is a fully scanned handwritten document with no extractable text, and the image cannot be retrieved through available tools. Please type out or paste the patient's case details (chief complaint, age, sex, symptoms, duration), and I will customize every section above - especially the negative history, differential diagnosis, and management - specifically to that patient's presentation.
Sources: Adams and Victor's Principles of Neurology 12th Ed; Bradley and Daroff's Neurology in Clinical Practice; Hutchison's Clinical Methods 24th Ed framework
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