"larynx"[MeSH Terms] AND anatomy

larynx anatomy overview extent C3 C6 official medical manual

labelled external anatomy larynx thyroid cartilage cricoid cartilage hyoid bone anterior view

"Laryngeal Cartilages" AND anatomy

laryngeal cartilages anatomy thyroid cricoid arytenoid epiglottis NCBI

labelled laryngeal cartilages anatomy thyroid cricoid arytenoid epiglottis diagram

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mkdir -p "/tmp/workspace/larynx-study-guide/src" "/tmp/workspace/larynx-study-guide/output"

python - <<'PY' from reportlab.lib.pagesizes import A4 from reportlab.lib import colors from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle from reportlab.lib.enums import TA_CENTER from reportlab.lib.units import cm from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Table, TableStyle, PageBreak, KeepTogether from reportlab.pdfbase.pdfmetrics import stringWidth from reportlab.pdfbase.ttfonts import TTFont from reportlab.pdfbase import pdfmetrics from reportlab.lib.colors import HexColor from reportlab.pdfgen import canvas from pathlib import Path out=Path('/tmp/workspace/larynx-study-guide/output/Larynx_Anatomy_Study_Guide_Steps_1-2.pdf') styles=getSampleStyleSheet() styles.add(ParagraphStyle(name='TitleX', parent=styles['Title'], fontName='Helvetica-Bold', fontSize=25, leading=30, alignment=TA_CENTER, textColor=HexColor('#17365D'), spaceAfter=16)) styles.add(ParagraphStyle(name='SubX', parent=styles['Normal'], fontSize=11, leading=15, alignment=TA_CENTER, textColor=HexColor('#444444'), spaceAfter=18)) styles.add(ParagraphStyle(name='H1X', parent=styles['Heading1'], fontName='Helvetica-Bold', fontSize=17, leading=21, textColor=HexColor('#17365D'), spaceBefore=10, spaceAfter=8)) styles.add(ParagraphStyle(name='H2X', parent=styles['Heading2'], fontName='Helvetica-Bold', fontSize=13, leading=16, textColor=HexColor('#1F4E79'), spaceBefore=9, spaceAfter=5)) styles.add(ParagraphStyle(name='BodyX', parent=styles['BodyText'], fontSize=9.7, leading=13.3, spaceAfter=6)) styles.add(ParagraphStyle(name='SmallX', parent=styles['BodyText'], fontSize=8.5, leading=11.2, spaceAfter=4)) styles.add(ParagraphStyle(name='Sketch', parent=styles['Code'], fontName='Courier', fontSize=7.5, leading=9.3, leftIndent=5, textColor=HexColor('#1F1F1F'))) def P(txt, style='BodyX'): return Paragraph(txt, styles[style]) def table(data, widths): t=Table(data, colWidths=widths, repeatRows=1, hAlign='LEFT') t.setStyle(TableStyle([('BACKGROUND',(0,0),(-1,0),HexColor('#D9EAF7')),('TEXTCOLOR',(0,0),(-1,0),HexColor('#17365D')),('FONTNAME',(0,0),(-1,0),'Helvetica-Bold'),('FONTSIZE',(0,0),(-1,-1),8.2),('LEADING',(0,0),(-1,-1),10),('GRID',(0,0),(-1,-1),0.35,HexColor('#AAB7C4')),('VALIGN',(0,0),(-1,-1),'TOP'),('LEFTPADDING',(0,0),(-1,-1),5),('RIGHTPADDING',(0,0),(-1,-1),5),('TOPPADDING',(0,0),(-1,-1),4),('BOTTOMPADDING',(0,0),(-1,-1),4),('ROWBACKGROUNDS',(0,1),(-1,-1),[colors.white,HexColor('#F7FAFC')])])) return t class NumCanvas(canvas.Canvas): def __init__(self,*args,**kwargs): canvas.Canvas.__init__(self,*args,**kwargs); self.pages=[] def showPage(self): self.pages.append(dict(self.__dict__)); self._startPage() def save(self): n=len(self.pages) for state in self.pages: self.__dict__.update(state); self.setFont('Helvetica',8); self.setFillColor(HexColor('#667788')); self.drawString(1.55*cm,1.1*cm,'Larynx Anatomy Study Guide'); self.drawRightString(19.45*cm,1.1*cm,f'Page {self._pageNumber} of {n}'); canvas.Canvas.showPage(self) canvas.Canvas.save(self) doc=SimpleDocTemplate(str(out),pagesize=A4,rightMargin=1.55*cm,leftMargin=1.55*cm,topMargin=1.5*cm,bottomMargin=1.65*cm) story=[] story += [Spacer(1,2.2*cm),P('LARYNX ANATOMY','TitleX'),P('Structured study guide: Steps 1 and 2','SubX'),P('From foundations to clinical anatomy | Cumulative document, updated after each step','SubX'),Spacer(1,1.5*cm),P('<b>Completed sections</b>','H2X'),P('Step 1: Overview, position, extent and functions<br/>Step 2: Laryngeal cartilages in detail','BodyX'),Spacer(1,1.2*cm),P('<b>How to use this guide</b>','H2X'),P('Learn the framework first. Then connect each cartilage to its attachments, movements and clinical relevance. Text sketches are intentionally simple for rapid recall and drawing practice.', 'BodyX'),PageBreak()] # step 1 story += [P('Step 1. Overview of the larynx','H1X'),P('The larynx is a mobile, hollow musculoligamentous organ with a cartilaginous framework. It is continuous with the laryngopharynx superiorly and the trachea inferiorly. It acts as an airway valve and as the organ of phonation.','BodyX'),P('Position and extent','H2X'),table([[P('Feature','SmallX'),P('Key fact','SmallX')],[P('Location','SmallX'),P('Anterior midline of neck, anterior to laryngopharynx and oesophagus.','SmallX')],[P('Adult extent','SmallX'),P('Approximately C3 to C6; it continues as the trachea at the inferior border of cricoid cartilage, near C6.','SmallX')],[P('Suspension','SmallX'),P('Attached to hyoid bone superiorly and trachea inferiorly; therefore highly mobile during swallowing.','SmallX')],[P('Core functions','SmallX'),P('Respiration, lower-airway protection, phonation, cough and pressure fixation for Valsalva.','SmallX')]], [4.2*cm,13.8*cm]),Spacer(1,8),P('Surface sketch','H2X'),P(''' HYOID BONE | THYROHYOID MEMBRANE | THYROID CARTILAGE (Adam\'s apple) | CRICOTHYROID MEMBRANE | CRICOID CARTILAGE | TRACHEA''','Sketch'),P('Clinical landmark: the median cricothyroid ligament is the palpable soft interval between thyroid and cricoid cartilages. It is the access site for emergency cricothyrotomy.','BodyX'),P('Reference: <i>Gray’s Anatomy for Students</i>, p. 1192.','SmallX'),PageBreak()] # Step2 story += [P('Step 2. Laryngeal cartilages','H1X'),P('The laryngeal skeleton comprises <b>nine principal cartilages</b>: three unpaired cartilages and three paired sets. Thyroid, cricoid and arytenoid cartilages are mainly hyaline cartilage, whereas epiglottic, corniculate and cuneiform cartilages are elastic. Hyaline cartilages may ossify with age.','BodyX'),P('Classification','H2X'),table([[P('Unpaired','SmallX'),P('Paired','SmallX')],[P('<b>Thyroid</b><br/>Largest cartilage; anterior shield.','SmallX'),P('<b>Arytenoid</b><br/>Pyramidal, mobile vocal-fold anchors.','SmallX')],[P('<b>Cricoid</b><br/>Only complete cartilaginous airway ring.','SmallX'),P('<b>Corniculate</b><br/>Small conical cartilages on arytenoid apices.','SmallX')],[P('<b>Epiglottis</b><br/>Leaf-shaped inlet-protecting cartilage.','SmallX'),P('<b>Cuneiform</b><br/>Club-shaped supports in aryepiglottic folds.','SmallX')]], [9*cm,9*cm]),P('Orientation sketch: lateral view','H2X'),P(''' EPIGLOTTIS /\ / \ HYOID --- \____ THYROID CARTILAGE \ \ \____\ <-- inferior horn | (cricothyroid joint) CRICOID (signet ring) | TRACHEA''','Sketch')] # thyroid story += [P('A. Thyroid cartilage','H2X'),P('It is the <b>largest laryngeal cartilage</b>. Two broad laminae unite anteriorly and diverge posteriorly, like an open book. Their anterior fusion forms the <b>laryngeal prominence</b>. The angle is typically more acute in men, making the prominence more apparent.','BodyX'),table([[P('Feature','SmallX'),P('Detail and attachment','SmallX')],[P('Superior thyroid notch','SmallX'),P('Midline notch immediately above laryngeal prominence; important surface landmark. A less distinct inferior thyroid notch lies inferiorly.','SmallX')],[P('Posterior border','SmallX'),P('Forms superior and inferior horns (cornua). Inferior horn has a medial facet for cricoid articulation.','SmallX')],[P('Superior horn','SmallX'),P('Connected to greater horn of hyoid by lateral thyrohyoid ligament.','SmallX')],[P('Oblique line','SmallX'),P('Lateral ridge with superior and inferior thyroid tubercles. Provides attachment for sternothyroid, thyrohyoid and inferior constrictor.','SmallX')],[P('Internal surface','SmallX'),P('Receives anterior attachment of vocal ligaments at anterior commissure.','SmallX')]], [4.2*cm,13.8*cm]),P('<b>Clinical link:</b> The thyroid cartilage protects the anterior larynx. It can fracture in significant blunt neck trauma or strangulation, particularly when ossified.','BodyX')] # cricoid story += [P('B. Cricoid cartilage','H2X'),P('The most inferior laryngeal cartilage and the <b>only complete cartilaginous ring</b> of the airway. It resembles a signet ring: a narrow anterior arch and a broad posterior lamina.','BodyX'),table([[P('Part','SmallX'),P('Important points','SmallX')],[P('Arch','SmallX'),P('Narrow anterior portion. Its superior margin is connected to thyroid cartilage by the cricothyroid membrane.','SmallX')],[P('Lamina','SmallX'),P('Broad posterior portion. Posterior surface has two depressions for posterior cricoarytenoid muscles, separated by a vertical ridge related to oesophagus.','SmallX')],[P('Superolateral facets','SmallX'),P('Articulate with arytenoid bases to form cricoarytenoid joints.','SmallX')],[P('Lateral facets','SmallX'),P('Articulate with medial surface of inferior horns of thyroid cartilage, forming cricothyroid joints.','SmallX')]], [4.2*cm,13.8*cm]),P('<b>Clinical link:</b> Its lower border is at approximately C6, a key level marking the beginning of trachea. The cricoid is relevant in airway endoscopy, intubation and subglottic stenosis.','BodyX')] # page break story += [PageBreak(),P('C. Epiglottis','H2X'),P('A <b>leaf-shaped elastic cartilage</b>. Its inferior stem, the petiolus, attaches to the posterior surface of thyroid cartilage near the angle via the <b>thyroepiglottic ligament</b>. The broad free upper margin lies behind the tongue base. Its posterior surface has an epiglottic tubercle.','BodyX'),P('During swallowing, elevation and forward movement of hyoid and larynx, together with bolus pressure and laryngeal closure, brings the epiglottis into a protective position over the laryngeal inlet. It should not be thought of as the only protective mechanism.','BodyX'),P('<b>Clinical link:</b> Acute inflammation and oedema of the epiglottis or adjacent supraglottis may rapidly threaten the airway. Avoid provocative examination in suspected severe epiglottitis until airway support is available.','BodyX'),P('D. Arytenoid cartilages','H2X'),P('These paired, pyramid-shaped cartilages sit on the superolateral cricoid lamina. Their position changes through movements at the cricoarytenoid joints, thereby changing vocal-fold position.','BodyX'),table([[P('Feature','SmallX'),P('Detail','SmallX')],[P('Base','SmallX'),P('Concave and articulates with the cricoid facet.','SmallX')],[P('Apex','SmallX'),P('Articulates with corniculate cartilage.','SmallX')],[P('Vocal process','SmallX'),P('Anterior projection from base. Provides attachment for vocal ligament.','SmallX')],[P('Muscular process','SmallX'),P('Lateral projection. Receives posterior and lateral cricoarytenoid muscles.','SmallX')],[P('Anterolateral surface','SmallX'),P('Has areas for vocalis muscle and vestibular ligament attachment.','SmallX')],[P('Posterior surface','SmallX'),P('Covered by transverse arytenoid muscle.','SmallX')]], [4.2*cm,13.8*cm]),P('Arytenoid sketch','H2X'),P(''' Apex /\ <-- corniculate cartilage / \ / \ / \ vocal process -------> anterior \ / \____/ Base on cricoid | muscular process --> lateral''','Sketch'),P('<b>Clinical link:</b> Arytenoid fixation, dislocation or impaired recurrent laryngeal nerve input can prevent normal vocal-fold movement and produce hoarseness, aspiration symptoms or airway compromise.','BodyX')] # smaller story += [P('E. Corniculate and cuneiform cartilages','H2X'),table([[P('Cartilage','SmallX'),P('Location and role','SmallX')],[P('Corniculate','SmallX'),P('Small conical pair. Each base articulates with apex of arytenoid; apices project posteromedially. They reinforce the posterior part of the aryepiglottic folds.','SmallX')],[P('Cuneiform','SmallX'),P('Small club-shaped pair lying anterior to corniculates, suspended within the aryepiglottic folds. They support these folds but do not articulate with other cartilages.','SmallX')],[P('Triticeal cartilage','SmallX'),P('Variable small cartilage, sometimes present within the lateral thyrohyoid ligament. Not one of the standard nine principal laryngeal cartilages.','SmallX')]], [4.2*cm,13.8*cm]),P('Integrated recall sketch','H2X'),P(''' Epiglottis / \ cuneiform --> o o <-- cuneiform corniculate -> * * <- corniculate arytenoids || cricoid lamina [____] thyroid cartilage anteriorly''','Sketch'),P('High-yield summary','H2X'),table([[P('Question','SmallX'),P('Answer','SmallX')],[P('Largest cartilage?','SmallX'),P('Thyroid cartilage.','SmallX')],[P('Only complete airway ring?','SmallX'),P('Cricoid cartilage.','SmallX')],[P('Attachment for vocal ligament?','SmallX'),P('Vocal process of arytenoid, anteriorly to thyroid cartilage.','SmallX')],[P('Attachment for PCA and LCA muscles?','SmallX'),P('Muscular process of arytenoid.','SmallX')],[P('Cartilage that caps laryngeal inlet?','SmallX'),P('Epiglottis, assisted by coordinated laryngeal elevation and closure.','SmallX')],[P('Elastic cartilages?','SmallX'),P('Epiglottis, corniculate and cuneiform.','SmallX')]], [7*cm,11*cm]),P('Core sources: <i>Gray’s Anatomy for Students</i>, pp. 1192-1195; [NCBI StatPearls larynx overview](https://www.ncbi.nlm.nih.gov/books/NBK538202).','SmallX')] doc.build(story,canvasmaker=NumCanvas) print(out, out.exists(), out.stat().st_size) PY python - <<'PY' from pypdf import PdfReader p='/tmp/workspace/larynx-study-guide/output/Larynx_Anatomy_Study_Guide_Steps_1-2.pdf' r=PdfReader(p) print('pages',len(r.pages),'textchars',sum(len(x.extract_text() or '') for x in r.pages)) PY

"Larynx"[MeSH Terms] AND anatomy

laryngeal cavity vestibule ventricle glottis subglottis anatomy NCBI

labelled laryngeal cavity vestibule ventricle glottis subglottis sagittal diagram

~/larynx-study-guide/