Intrisnic Laryngeal Muscles

Question 1

Thyroarytenoid Parts

Answer 1

Thyrovocalis (Internal thyroarytenoid)

Thyromuscularis (External thyroarytenoid)

Question 2

Thyroarytenoid origin

Answer 2

Inside surface of thyroid cartilage

Question 3

Thyroarytenoid insertion

Answer 3

Ipsilateral arytenoid cartilage

Question 4

Thyroarytenoid use

Answer 4

Reduces distance between thyroid and arytenoid cartilages and/or increases tension

Question 5

Posterior cricoarytenoid origin

Answer 5

Back surface of cricoid cartilage

Question 6

Posterior cricoarytenoid insertion

Answer 6

Upper and back surfaces of muscular process of the arytenoid cartilage

Question 7

Posterior cricoarytenoid use

Answer 7

Rocks arytenoid cartilages away from midline and may also slide it upward and backward and abducts vocal folds

Question 8

Lateral cricoarytenoid origin

Answer 8

Upper rim of cricoid cartilage

Question 9

Lateral cricoarytenoid insertion

Answer 9

On the muscular process and front of arytenoid cartilage

Question 10

Lateral circoarytenoid use

Answer 10

Rocks arytenoid cartilage toward the midline and may slide arytenoid forward and to the side

Causes vocal folds to adduct

Question 11

Arytenoid parts

Answer 11

-Transverse
-Oblique
-Aryepiglottic

Question 12

Arytenoid origin

Answer 12

Transverse: Back surface of one arytenoid

Oblique: Back and side surface and the muscular process of the arytenoid

Question 13

Arytenoid insertion

Answer 13

Transverse: At the same location on the other arytenoid

Oblique: Apex of the opposite arytenoid

Question 14

Arytenoid use

Answer 14

Transverse and Oblique: Pull arytenoid cartilages toward each other

Aryepiglottic: Pulls the epiglottis backward and downward to cover the larynx

Question 15

Cricothyroid parts

Answer 15

-Pars rectus
-Pars oblique

Question 16

Cricothyroid origin

Answer 16

From the outer front and side of the anterior arch of the cricoid cartilage

Question 17

Cricothyroid insertion

Answer 17

On the outer front and side of the lower border of the lamina and inferior cornu of the thyroid cartilage

Question 18

Cricothyroid use

Answer 18

Decreases the distance between the upper border of the cricoid cartilage and the lower border of the thyroid cartilage at the front

Rocking movement; also a forward sliding movement effected through the pars oblique