Intrinsic Muscles of the Larynx

Question 1

Cricothyroid m. origin

Answer 1

Arch of the cricoid cartilage

Question 2

Cricothyroid m. insertion

Answer 2

Interior border and medial surface of thyroid cartilage

Question 3

Cricothyroid m. action

Answer 3

lengthens, tenses, and adducts the vocal cords

Question 4

Cricothyroid m. innervation

Answer 4

External branch of superior laryngeal n.

Question 5

Posterior cricoarytenoid m. origin

Answer 5

Posterior surface of lamina of the cricoid cartilage

Question 6

Posterior cricoarytenoid m. insertion

Answer 6

Muscular process of the arytenoid cartilage

Question 7

Posterior cricoarytenoid m. action

Answer 7

Abduct the vocal cords

Question 8

Posterior cricoarytenoid m. innervation

Answer 8

Recurrant laryngeal n.

Question 9

Lateral cricoarytenoid m. origin

Answer 9

Upper border of arch of the cricoid cartilage

Question 10

Lateral cricoarytenoid m. insertion

Answer 10

Anterior surface of muscular process of arytenoid cartilage

Question 11

Lateral cricoarytenoid m. action

Answer 11

Adducts the vocal cords

Question 12

Lateral cricoarytenoid m. innervation

Answer 12

Recurrent laryngeal n.

Question 13

Transverse arytenoid m. origin

Answer 13

Posterior surface on one arytenoid cartilage

Question 14

Transverse arytenoid m. insertion

Answer 14

Posterior surface on other arytenoid cartilage

Question 15

Transverse arytenoid m. action

Answer 15

Adducts the vocal cords

Question 16

Transverse arytenoid m. innervation

Answer 16

Recurrent laryngeal n.

Question 17

Oblique arytenoid m. origin

Answer 17

Posterior surface of muscular process of arytenoid cartilage

Question 18

Oblique arytenoid m. insertion

Answer 18

Apex of other arytenoid cartilage

Question 19

Oblique arytenoid m. action

Answer 19

Sphincter of vestibule of the larynx

Question 20

Oblique arytenoid m. innervation

Answer 20

Recurrent laryngeal n.

Question 21

Aryepiglottic m. origin

Answer 21

Arytenoid cartilages

Question 22

Aryepiglottic m. insertion

Answer 22

Thyroepiglottic ligament

Question 23

Aryepiglottic m. action

Answer 23

Sphincters of the vestibule of the larynx

Question 24

Aryepiglottic mm. innervation

Answer 24

Recurrent laryngeal n.

Question 25

Thyroarytenoideus mm. origin

Answer 25

Inner surface of the thyroid cartilage where two laminae come together

Question 26

Thyroarytenoideus mm. insertion

Answer 26

Lateral surfaces of the arytenoid cartilages

Question 27

Thyroarytenoideus mm. action

Answer 27

Lessen the tension in the vocal ligament; sphincters of the glottis

Question 28

Thyroarytenoideus mm. innervation

Answer 28

Recurrent laryngeal n.

Question 29

Vocalis m. origin

Answer 29

Inner surface of the thyroid cartilage where the two laminae meet

Question 30

Vocalis m. insertion

Answer 30

Vocal process and base of arytenoid cartilages

Question 31

Vocalis m. action

Answer 31

Shorten vocal cords, lessens tension of vocal ligament, tensing small portions of vocal cord at a time, may play role in control of pitch

Question 32

Vocalis m. innervation

Answer 32

Recurrent laryngeal n.