Muscles of the Larynx

Question 1

Aryepiglotticus

Answer 1

attachments- from the oblique arytenoids to the aryepiglottic folds

function- closes the aryepiglottic folds

innervation- recurrent laryngeal n.

blood supply- superior & inferior laryngeal a.

Question 2

Lateral cricoarytenoid

Answer 2

attachments- from the arch of the cricoid cartilage to the muscular process of the arytenoid

function- closes the glottis (adducts the vocal folds)

innervation- recurrent laryngeal n.

blood supply- superior & inferior laryngeal a.

Question 3

Posterior Cricoarytenoid

Answer 3

attachments- from the posterior surface of the cricoid lamina to the muscular process of the arytenoid cartilage

function- opens the glottis (abducts the vocal folds)

innervation- recurrent laryngeal n.

blood supply- superior & inferior laryngeal a.

Question 4

Cricothyroid

Answer 4

attachments- from the anterolateral external aspect of the cricoid cartilage to the lower border of the thyroid cartilage & inferior cornu

function- tenses the vocal folds

innervation- external laryngeal n.

blood supply- superior thyroid a.

Question 5

Interarytenoids (transverse and oblique)

Answer 5

attachments- from arytenoid to arytenoid

function- closes glottis & assists in closing aryepiglottic folds

innervation- recurrent laryngeal n.

blood supply- superior & inferior laryngeal a.

Question 6

Thyroarytenoid

Answer 6

attachments- from the lower half of the thyroid angle to the anterolateral aspect of the arytenoid cartilage

function- closes glottis or slackens vocal folds

innervation- recurrent laryngeal n.

blood supply- superior & inferior laryngeal a

Question 7

Thyroepiglotticus

Answer 7

attachments- from the thyroid angle to the epiglottic margin

function- widens glottis

innervation- recurrent laryngeal n.

blood supply- superior & inferior laryngeal a.

Question 8

Vocalis

Answer 8

attachments- from the thyroid angle to the vocal process of the arytenoid cartilage

function- slackens tensed vocal ligaments for changes in pitch

innervation- recurrent laryngeal n.

blood supply- superior & inferior laryngeal a

Question 9

Muscles of the middle ear

Stapedius

Answer 9

attachments- from posterior wall (pyramidal eminence) of tympanic cavity to neck of stapes

function- dampens vibrations of the stapes

innervation- facial n.

blood supply- posterior auricular, anterior tympanic & middle meningeal a.

Question 10

Tensor Tympani

Answer 10

attachments- from pharyngotympanic tube to handle of malleus

function- dampens movement of the *malleus

innervation- nerve to the medial pterygoid, mandibular n.blood supply- superior tympanic branch of middle meningeal a