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Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
Larynx
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Larynx

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  • 1. LARYNX
  • 2. • INTRODUCTION • DEVELOPMENT OF LARYNX • SKELETAL FRAMEWORK • SUBDIVISON OF LARYNX • MUSCLES • HISTOLOGY • BLOOD SUPPLY • NERVE SUPPLY • LYMPHATIC DRAINAGE • APPLIED ANATOMY
  • 3. SITUATION AND EXTENT MEASURMENTS- Male larynx V=44mm,T=43 mm,AP=36mm Female larynx V=36mm,T=41 mm,AP=26mm
  • 4. DEVELOPMENT • Laryngotracheal tube ventral wall of primitive pharynx- 28 days of development • 4th arch-thyroid,cunieform, corniculate 5th arch- cricoid 6th arch- arytenoid Epiglottis- caudal part of hypobranchial eminence Muscles- 4 & 6 arches
  • 5. CARTILAGES Paired • Arytenoid • Corniculate • Cuneiform • Cartilago triticea Unpaired • Thyroid • Cricoid • Epiglottis 5
  • 6. THYROID CARTILAGE ANTERIOR ASPECT
  • 7. POSTERIOR ASPECT LATERAL ASPECT
  • 8. EPIGLOTTIS
  • 9. CRICOID CARTILAGE
  • 10. ARYTENOID CARTILAGE
  • 11. CORNICULATE AND CUNEIFORM CARTILAGE Corniculate cartilage of Santorini Cunieform cartilage of Wrisberg Cartilage Tritiate TRITIATE CARTILAGE
  • 12. JOINTS: Lateral View Antero-superior View • CRICOTHYROID JOINT • CRICOARYTENOID JOINT • ARTENOCORNICULATE JOINT
  • 13. MEMBRANES & LIGAMENTS • Extrinsic • Thyrohyoid • Cricotracheal • Thyroepiglottic • Hyoepiglottic • Intrinsic • Quadrangular membrane & vestibular ligament • Cricovocal membrane & vocal ligament
  • 14. EXTRINSIC • Thyrohyoid • Cricothyroid • Cricotracheal
  • 15. Sagittal section showing interior of left half of larynx EXTRINSIC Hyoepiglottic Ligament Thyroepiglottic Ligament
  • 16. INTRINSIC Sagittal section of left side of larynx showing laryngeal membranes
  • 17. Coronal section through the larynx and cranial end of trachea Posterior aspect SUBDIVISIONS OF LARYNGEAL CAVITY LARYNGEAL INLET ARYEPIGLOTTIC FOLD SACCULE VESTIBULAR FOLD VOCAL FOLD
  • 18. PARALUMENAL SPACES Pre-epiglottic space Paraglottic space Subglottic space
  • 19. EXTRINSIC MUSCLES Extrinsic attached to hyoid (Depressors) – Sternothyroid – Sternohyoid – Thyrohyoid
  • 20. Extrinsic attached to thyroid (Elevators ) – Palatopharyngeus – stylopharyngeus
  • 21. INTRINSIC Muscles acting on VC – Length and tension • Cricothyroid • Thyroarytenoids – Abductor • Post cricoarytenoid – Adductors • Lateral cricoarytenoid • Thyroarytenoid • Interarytenoideus Muscles acting on epiglottis – Aryepiglotticus – Thyroepiglotticus
  • 22. CRICOTHYROID MUSCLE
  • 23. Posterior Aspect Superior Aspect POSTERIOR CRICOARYTENOID MUSCLE
  • 24. LATERAL CRICOARYTENOID MUSCLE
  • 25. OBLIQUE ARYTENOID MUSCLE and ARYEPIGLOTTICUS
  • 26. TRANSVERSE ARYTENOID MUSCLE
  • 27. THYROARYTENOID and VOCALIS MUSCLE
  • 28. SHAPE OF RIMA GLOTTIDIS DURING DIFFERENT MOVEMENTS OF VOCAL CORDS
  • 29. DURING PHONATION DURING WHISPERING
  • 30. NERVE SUPPLY Internal Laryngeal Nerve : only sensory External Laryngeal Nerve : only motor Recurrent Laryngeal Nerve : sensory and motor
  • 31. ARTERIAL SUPPLY Sup Laryngeal Artery Inferior Laryngeal Artery
  • 32. VENOUS DRAINAGE Sup Thyroid Vein Inf Thyroid Vein
  • 33. LYMPHATIC DRAINAGE • Above VC upper deep cervical {anterosuperior group} • Below VC lower deep cervical {posteroinferior group} Upper deep cervical Lower deep cervical
  • 34. HISTOLOGY • Histology of Supraglottis • Epithelium • Mucous glands • Rich vascularity & lymphatic • Histology of Glottis • Epithelium • Lamina propria – 3 layers • Muscle layer- vocalis • No mucous gland in free edge of vocal cord • Cartilages
  • 35. HISTOLOGY OF EPIGLOTTIS •Epithelium •Lamina propria •cartilage
  • 36. INFANT LARYNX • Size • Position • Cavity- funnel shaped & short • Laryngeal cartilages-softer & pliable • Epiglottis • Thyroid • Vocal cord
  • 37. APPLIED ANATOMY
  • 38. CONGENITAL ANOMALIES OF LARYNX :CLASSIFICATION • 1. SUPRAGLOTTIS LARYNGOMALACIA LARYNGEAL CYST CONGENITAL LARYNGOCELE 2. GLOTTIS LARYNGEAL WEB VOCAL CORD PARALYSIS 3. SUBGLOTTIS: SUBGLOTTIC STENOSIS LARYNGOTRACHEAL CLEFT
  • 39. LARYNGOMALACIA • Excessive flaccidity of supraglottic larynx • OMEGA SHAPED EPIGLOTTIS
  • 40. LARYNGEAL CYST • fluid filled smooth swelling in Supraglottic larynx
  • 41. LARYNGOCELE Air filled dialatation of saccule
  • 42. ANTERIOR GLOTTIC WEB •Due to incomplete recanalisation of larynx LARYNGEAL WEB
  • 43. • SUBGLOTTIC STENOSIS Abnormal thickening of cricoid cartilage or fibrous tissue seen below vocal cords
  • 44.  Requires laryngeal mirror and head mirror  Structures seen…………… LARYNGOSCOPY- Indirect Laryngoscopy
  • 45. Done under GA Before endotracheal intubation Direct Laryngoscopy
  • 46. SINGERS /SCREAMERS/CLERGYMENS NODULES
  • 47. REINKE’S EDEMA
  • 48. CLASSIFICATION OF LARYNGEAL PARALYSIS • May be unilateral or bilateral and may involve 1. Recurrent laryngeal nerve 2. Superior laryngeal nerve a. External LN b. Internal LN
  • 49. LARYNGEAL OBSTRUCTION
  • 50. LARYNGOTOMY
  • 51. INFLAMMATION OF LARYNX
  • 52. MALIGNANCY OF LARYNX • Supraglottic • Glottic • Subglottic

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