Anatomy

Question 1

larynx innervation

Answer 1

SENSORY:
-vagus –> superior laryngeal –> internal laryngeal above vocal folds
-recurrent laryngeal below
MOTOR:
-external laryngeal to cricothyroid m.
-recurrent laryngeal to all other muscles

Question 2

larynx blood supply

Answer 2

ext. carotid –> sup. thyroid a. –> sup. laryngeal a.

subclavian –> thyrocervical trunk –> inf. thyroid a. –> inf. laryngeal a.

Question 3

larynx lymphatic drainage

Answer 3

above vocal folds: upper deep cervical

below vocal folds: lower deep cervical or paratracheal

Question 4

cartilage on top of arytenoid

Answer 4

corniculate cartilage

Question 5

What cartilage is in the quadrangular membrane, stiffening it?

Answer 5

cuneiform cartilages

Question 6

synovial joints of larynx, function

Answer 6

1) cricothyroid joints: inf. thyroid horn –> cricoid. Allow thyroid to tip relative to cricoid.
2) cricoarytenoid joint: arytenoid –> sup. surface of posterior cricoid. Allows sliding (ab/adduction) and rotation around vertical axis, opening and closing the rima glottidis

Question 7

quadrangular (aryepiglottic) membrane

Answer 7

top forms aryepiglottic fold

bottom are free edges (vestibular ligament/fold)

Question 8

cricovocal (crycothyroid) ligament forms _________

Answer 8

vocal ligament at free top edge

Question 9

space between true and false vocal chords

Answer 9

ventricle

Question 10

vocal chord abductor

Answer 10

posterior cricoarytenoid

Question 11

vocal chord adductors, function

Answer 11

1) lateral cricoartenoid rotates vocal process medially

2) transverse and oblique arytenoid muscles, slide arytenoids together

Question 12

vocal chord lengthener

Answer 12

cricothyroid muscle