muscles of head and neck Flashcards Preview

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Flashcards in muscles of head and neck Deck (38)
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1

frontal belly of occipitofrontalis

N: terminal branches of facial nerve, temporal branch
A: elevate eyebrows, wrinkle forehead

2

occipital belly of occipitofrontalis

N: terminal branches of facial neve, temporal branch
A: draw scalp back

3

orbicularis oculi

N: terminal branches of facial nerve, mostly zygomatic branch
A: close eyelids. paplpebral part does blinking, orbital is more forceful

4

orbicularis oris

N: terminal branches of facial nerve, mostly mandibular branch
A: close lips; pull lips toward teeth or pucker up

5

buccinator

N: terminal branches of facial nerve, buccal branch
A: presses cheek against tooth to keep food in mouth

6

platysma

N: terminal branches of facial nerve, cervial branch
A: pulls mouth out and down; can wrinkle the skin of neck

7

levator palpebrae superioris

N: occulomotor and a little Sy
A: raises upper eyelid

8

tensor veli palatini

N: Mandibular division of trigeminal
A: tenses soft palate; opens auditory tube during swallowing and or yawning to equalize pressure

9

superior pharyngeal constrictor

N: pharyngeal plexus of vagus
A: constricts upper pharynx during swallowing

10

middle pharyngeal constrictor

N: pharyngeal plexus of the vagus
A: constricts the wall of the pharynx during swallowing

11

inferior pharyngeal constrictor

N: pharyngeal plexus of the vagus
A: constricts the wall of the lower pharynx

12

stylopharyngeus

N: glossopharyngeal (IX)
A: elevates pharynx and larynx during swallowing and speaking

13

sternocleidomastoid

N: accessory nerve (CN XI and C2-3)
A: tilts, flexes, and rotates the head/neck

14

temporalis

N: mandibular division of trigeminal
A: elevate and retract mandible

15

masseter

N: mandibular division of trigeminal
A: elevates mandible

16

medial pterygoid

N: mandibular division of trigeminal
A: elevates mandible; protrudes mandible to opposite side with help from laterial pterygoid on same side

17

lateral pterygoid

N: mandibular division of trigeminal
A: oens mouth; protrudes mandible to opposite side with help from laterial pterygoid on same side

18

mylohyoid

N: nerve to mylohyoid from the mandibular div. of trigeminal
A: elevates hyoid, raises floor of mouth during swallowing etc.

19

geniohyoid

N: C1 via hypoglossal nerve (CN XII)
A: elevates and pulls hyoid forward; helps depress mandible

20

genioglossus

N: hypoglossal n. (CN XII)
A: depress, protrude tongue

21

hyoglossus

N: hypoglossal n. (CN XII)
A: depresses, retracts tongue

22

styloglossus

N: hypoglossal n. (CN XII)
A: retracts tongue and pulls it up during swallowing

23

levator veli palatini

N: vagus nerve
A: elevates soft palate during swallowing and yawning

24

sternothyroid

N: C2-3 from ansa cervicalis
A: depresses larynx after it has been elevated for swallowing

25

omohyoid

N: C1-3 from ansa cervicalis
A: depresses hyoid after it has been elevate; retracts and steadies hyoid

26

thyrohyoid

N: C1 via hypoglossal n. (CN XII)
A: depresses hyoid and draws the thyroid cartilage superiorly

27

cricothyroid

N: external branch of superior laryngeal nerve from vagus
A: stretches and tenses the vocal cords

28

stylohyoid

N: facial nerve
A: elevates and retracts hyoid to elongate the floor of the mouth

29

digastric

N: anterior belly is nerve to mylohyoid (trigeminal) posterior belly is facial nerve
A: elevates hyoid bone and helps to depress the mandible to open the mouth

30

oblique and transverse arytenoids

N: recurrent laryngeal of vagus
A: close inlet of larynx by adducting arytenoid cart, narrowing rima glottidis