anatomy larynx

1. LARYNX

2. FRAMEWORK
 CARTILAGES
 JOINTS
 MUSCLES
 LIGAMENTS
 MEMBRANE

4. CARTILAGES
 Nine cartilages
 3 unpaired – Epiglottis,
Thyroid, Cricoid
 3 paired – Arytenoid,
Corniculate, Cuneiform

5. UNPAIRED CARTILAGES

6. EPIGLOTTIS

8. THYROID CARTILAGE

10. CRICOID CARTILAGE

11. ARYTENOID CARTILAGE

12. CORNICULATE
CARTILAGES

13. CUNEIFORM CARTILAGES

14. JOINTS

15. LIGAMENTS

16. EXTRINSIC LIGAMENTS

17. INTRINSIC LIGAMENTS

18. INTERIOR OF LARYNX

19. Laryngeal Inlet
 Faces backward and
upward and opens into
the laryngeal part of the
pharynx
 The opening is bounded:
• Anteriorly: by the
upper margin of
epiglottis
• Posteriorly & below by
arytenoid cartilages
• Laterally by
aryepiglottic folds
E
CU
CO
AEF
A

21. Laryngeal Cavity
 Extends from
laryngeal inlet to
lower border of the
cricoid cartilage
 Narrow in the region
of the vestibular folds
(rima vestibuli)
 Narrowest in the
region of the vocal
folds (rima glottidis)
Rima
vestibu
li
Rima
glottidi
s

22. Laryngeal Cavity
• Divided into three
parts:
A. Supraglottic part,
the part above the
vestibular folds, is
called the
vestibule
B. The part between
the vestibular &
the vocal folds, is
called the
ventricle
C. Infraglottic part,
the part below the
A
B
C

23. MUCOUS MEMBRANE

24. Para-glottic space

25. PIRIFORM FOSSA

27. VOCAL CORDS

28. POSITION OF
VOCAL CORDS

29. BLOOD
SUPPLY
LYMPHATIC
DRAINAGE

30. MUSCLES
 EXTRINSIC
 INTRINSIC
 INLET OPENER AND CLOSER
 VOCAL CORD TENSOR
 ADDUCTOR AND ABDUCTOR
 ELEVATOR AND DEPRESSOR

31. EXTRINSIC MUSCLES

32. Elevators of the LARYNX
 The Suprahyoid Muscles
 Digastric
 Stylohyoid
 Mylohyoid
 Geniohyoid
 The Longitudinal Muscles
 of the Pharynx
 Stylopharyngeus
 Salpingopharyngeus
 Palatopharyngeus

33. Depressors of the
Pharynx:
 The Infrahyoid Muscles
 Sternohyoid
 Sternothyroid
 Omohyoid

34. INTRINSIC MUSCLES OF LARYNX

37.  Abductor of vocal cords: .
 Posterior cricoarytenoid muscle

38. Adductors of vocal cords : three on
each
 Lateral cricoarytenoid muscle:

39. TRANSVERSE ARYTENOID

40. OBLIQUE ARYTENOID

41.  Tensors of the vocal cords
 cricothyroid muscle :

42.  Internal portion of thyro- arytenoid ( vocalis ) m. :
 A specialized portion of the lower and deeper fibers of the thyro-
arytenoid muscle .
 It forms a triangular bundle.
 Some of its fibers gain its attachment to the vocal ligament.
 It is known as the internal tensor .

43.  THYROARYTENOID

44.  Opener of laryngeal inlet :
 Fibers of thyro-epiglottic muscle is apart of the thyro-arytenoid muscle widens the
inlet of the larynx by pulling the ary-epiglottic folds slightly apart .

45.  Closers of the laryngeal inlet :
 Oblique portion of inter-arytenoid muscle is superficial to the transvers portion .
The two bundle of fibers cross each other ; closes the rima glttis .
 Ary-epiglotic muscle is prolongation of the oblique fibers of inter- arytenoid muscle
in to the ary- epiglotic fold .
All intrinsic muscles of the larynx are supplied by recurren laryngeal nerve except
Crico-thyroid m. which is supplied by external laryngeal nerve ..

46. NERVE SUPPLY

47. SUMMARY – MUSCLES

48. APPLIED ASPECTS
 EXAMINATION
 LARYNGITIS
 TUMOURS
 NERVE
PARALYSIS
 FOREIGN BODY
 TRACHEOSTOMY

49. LARYNGO
SCOPY

50. IDL

51. VOCAL NODULE

52. HEIMLICH MANOUVERE

53. LARYNGOCELE

56. TRACHEOSTOMY