Laryngeal Muscles

Question 1

Name muscle A.

Answer 1

Arytenoid muscle

Question 2

Name muscle B.

Answer 2

Lateral crico-arytenoid muscle

Question 3

Name muscle C.

Answer 3

Cricothyroid muscle

Question 4

Name muscle D.

Answer 4

Posterior crico-arytenoid muscle.

Question 5

Describe the origin of the arytenoid muscle.

Answer 5

Inner surface of thyroid cartilage

Question 6

Describe the insertion of the arytenoid muscle.

Answer 6

Arytenoid cartilage

Question 7

Describe the action of the arytenoid muscle.

Answer 7

Shortens and adducts vocal ligament;
Widens laryngeal inlet

Question 8

Describe the innervation of the arytenoid muscle.

Answer 8

Recurrent laryngeal nerve

Question 9

Describe the blood supply of the arytenoid muscle.

Answer 9

Superior and inferior thyroid arteries

Question 10

Describe the origin of the lateral cricoarytenoid muscle.

Answer 10

Superior margin of cricoid arch

Question 11

Describe the insertion of the lateral cricoarytenoid muscle.

Answer 11

Muscular process of arytenoid cartilage

Question 12

Describe the action of the lateral cricoarytenoid muscle.

Answer 12

Adducts vocal folds.

Question 13

Describe the innervation of the lateral cricoarytenoid muscle.

Answer 13

Recurrent laryngeal nerve

Question 14

Describe the blood supply of the lateral cricoarytenoid muscle.

Answer 14

Superior and inferior thyroid arteries

Question 15

Describe the origin of the cricothyroid muscle.

Answer 15

Cricoid arch of cricoid cartilage

Question 16

Decribe the insertion of the cricothyroid muscle.

Answer 16

Inferior horn of thyroid cartilage;
Inferior border of thyroid lamina

Question 17

Describe the action of the cricothyroid muscle.

Answer 17

Lengthens and alters tension of vocal folds.

Question 18

Describe the innervation of the cricothyroid muscle.

Answer 18

External branch of superior laryngeal nerve

Question 19

Describe the blood supply of the cricothyroid muscle.

Answer 19

Cricothyroid branch of superior thyroid artery

Question 20

Describe the origin of the posterior cricoarytenoid muscle.

Answer 20

Cricoid lamina of cricoid cartilage.

Question 21

Describe the insertion of the posterior cricoarytenoid muscle.

Answer 21

Muscular process of arytenoid cartilage

Question 22

Describe the action of the posterior cricoarytenoid muscle.

Answer 22

Abducts vocal chords

Question 23

Describe the innervation of the posterior cricoarytenoid muscle.

Answer 23

Recurrent laryngeal nerve

Question 24

Describe the blood supply of the posterior cricoarytenoid muscle.

Answer 24

Superior and inferior thyroid arteries