anatomy

Question 1

sternohyoid m.

innervation
action

Answer 1

ansa cervicalis
depresses hyoid

Question 2

omohyoid m.

innervation
action

Answer 2

ansa cervicalis
depresses hyoid

Question 3

sternothyroid m.

innervation
action

Answer 3

ansa cervicalis
depresses LARYNX

Question 4

thyrohyoid m.

innervation
action

Answer 4

C1 via hypoglossal n.
depresses hyoid

Question 5

SCM m.

innervation
action

Answer 5

accessory n. (CN 11)
bilateral- neck flexion
unilateral- contralateral head rotation

Question 6

mylohyoid m.

innervation
action

Answer 6

n. to mylohyoid (CN V3)
elevates hyoid

Question 7

digastric m. (two parts)

innervation
action

Answer 7

anterior belly- inferior alveolar n. (CN V3)
posterior belly- digastric branch of facial n. (CN 7)

elevates hyoid

Question 8

stylohyoid m.

innervation
action

Answer 8

stylohyoid branch of facial n. (CN 7)
elevates hyoid

Question 9

orbicularis oculi m. (two parts)

innervation
action

Answer 9

orbital part + palpebral part:
temporal + zygomatic branches of facial n. (CN 7)
closes eyelids

Question 10

nasalis m.

innervation
action

Answer 10

buccal branch of facial n. (CN 7)
compresses nostrils

Question 11

buccinator m.

innervation
action

Answer 11

buccal branch of facial n. (CN 7)
compresses cheeks

Question 12

orbicularis oris m.

innervation
action

Answer 12

buccal branch of facial n. (CN 7)
compresses lips

Question 13

masseter m.

innervation
action

Answer 13

masseteric n. (CN V3)
elevates mandible

Question 14

temporalis m.

innervation
action

Answer 14

anterior + posterior deep temporal nn. (CN V3)
elevates mandible

Question 15

lateral pterygoid m.

innervation
action

Answer 15

CN V3
bilateral- protrudes mandible
unilateral- side-to-side grinding

Question 16

medial pterygoid m.

innervation
action

Answer 16

CN V3
bilateral- protrudes mandible
unilateral- side-to-side grinding

Question 17

inferior rectus m.

innervation
action

Answer 17

CN 3
depresses + aBducts + laterally rotates eye

Question 18

superior rectus m.

innervation
action

Answer 18

CN 3
elevates + aDducts + medially rotates eye

Question 19

medial rectus m.

innervation
action

Answer 19

CN 3
aDducts eye

Question 20

lateral rectus m.

innervation
action

Answer 20

CN 6
aBducts eye

Question 21

superior oblique m.

innervation
action

Answer 21

CN 4
aBducts + depresses + medially rotates eye

Question 22

inferior oblique m.

innervation
action

Answer 22

CN 3
aBducts + elevates + laterally rotates eye

Question 23

levator palpebrae superioris m.

innervation
action

Answer 23

CN 3
elevates upper eyelid

Question 24

tensor tympani m.

innervation
action

Answer 24

CN V3
tenses TM by pulling it medially

Question 25

stapedius m. innervation action

Answer 25

n. to stapedius (CN 7) pulls stapes posteriorly = decreases oscillation of TM

Question 26

palatopharyngeus m. innervation action

Answer 26

vagus n. (CN 10) tenses soft palate

Question 27

palatoglossus m. innervation action

Answer 27

vagus n. (CN 10) elevates posterior tongue

Question 28

tensor veli palatini m. innervation action

Answer 28

CN V3 tenses soft palate

Question 29

levator veli palatini m. innervation action

Answer 29

vagus n. (CN 10) elevates soft palate

Question 30

musculus uvulae m. innervation action

Answer 30

vagus n. (CN 10) retracts uvula

Question 31

geniohyoid m. innervation action

Answer 31

C1 via hypoglossal n. elevates hyoid

Question 32

genioglossus m. innervation action

Answer 32

hypoglossal n. (CN 12) depresses tongue

Question 33

hyoglossus m. innervation action

Answer 33

hypoglossal n. (CN 12) depresses tongue

Question 34

styloglossus m. innervation action

Answer 34

hypoglossal n. (CN 12) retracts tongue

Question 35

posterior cricoarytenoid m. innervation action

Answer 35

recurrent laryngeal n. (CN 10) aBducts arytenoid cartilage

Question 36

oblique + transverse arytenoid m. innervation action

Answer 36

recurrent laryngeal n. (CN 10) aDducts arytenoid cartilage

Question 37

lateral cricoarytenoid m. innervation action

Answer 37

recurrent laryngeal n. (CN 10) aDducts arytenoid cartilage

Question 38

cricothyroid m. innervation action

Answer 38

superior laryngeal n. (CN 10) tenses vocal ligaments

Question 39

thyroarytenoid m. innervation action

Answer 39

recurrent laryngeal n. (CN 10) relaxes vocal ligaments