Neck Muscles Flashcards Preview

Gross Anatomy > Neck Muscles > Flashcards

Flashcards in Neck Muscles Deck (26):
1

what muscles elevate the hyoid bone?

mylohyoid, geniohyoid, stylohyoid, diagastric

2

what innervates the mylohyoid?

nerve to mylohyoid (V3)

3

what innervates the geniohyoid?

C1 fibers (runs with CN XII)

4

what innervates the stylohyoid?

cervical branch of facial (CN VII)

5

what innervates the digastric?

"DI"-gastric... two bellies

anterior belly: nerve to mylohyoid (V3)
posterior belly: facial (VII)

6

what muscles depress the hyoid bone?

sternohyoid, sternothyroid, omohyoid, thyrohyoid

7

what innervates the sternohyoid?

C1, C2, C3 (ana cervicalis)

8

what innervates the sternothryoid?

C1, C2, C3 (ana cervicalis)

9

what innervates the omohyoid?

C1, C2, C3 (ana cervicalis)

10

what innervates the thyrohyoid?

C1 fibers (run with CN XII)

11

what are the longitudinal muscles of the pharynx?

stylopharyngeus, salpingopharyngeus, palatopharyngeus

12

what are the actions of the longitudinal muscles of the pharynx?

elevates the pharynx and the larynx

except the salpingopharyngeus, which only elevates the pharynx

13

what innervates the stylopharyngeus?

glossopharyngeal nerve

14

what innervates the salpingopharyngeus?

vagus nerve (pharyngeal plexus)

15

what innervates the palaopharyngeus?

vagus nerve (pharyngeal plexus)

16

what are the circular muscles of the pharynx?

superior constrictor, middle constrictor, inferior constrictor

17

what is the action of the circular muscles of the pharynx?

constricts the pharynx

18

what innervates the circular muscles of the pharynx?

vagus nerve (pharyngeal plexus)

except the inferior constrictor is also innervated by the external branch of the superior laryngeal nerve of X and the recurrent laryngeal nerve

19

what is the action of the lateral cricoarytenoid?

adducts the vocal ligament and assists in closing the glottis

20

what is the action of the posterior cricoartenoid?

abducts the vocal ligament and opens the glottis

21

what is the action of the thyroarytenoid?

relaxes the vocal ligament

22

what is the action of the vocalis?

regulates tension of segments of vocal ligament

23

what is the action of the cricothyroid?

tenses vocal cords

24

what is the action of the transverse arythenoid?

closes glottis by adducting arytenoid cartilage

25

what is the action of the aryepiglotticus?

narrows inlet of larynx

26

what innervates the muscles that act on the larynx?

recurrent laryngeal nerve of X

EXCEPT the cricothyroid is innervated by the external branch of superior laryngeal nerve of X