MUSCLES

Question 1

innervation of the platysma muscle?

Answer 1

cervical branch of the facial n. (CN VII)

Question 2

innervation of the trapezius muscle?

Answer 2

CN XI

Question 3

innervation of the splenius capitis m?

Answer 3

C1 of the ansa cervicalis

Question 4

what is the innervation of the sternocleidomastoid?

Answer 4

motor innervation- accessory n (CN XI)

sensory innervation- cervical nerve plexus

Question 5

action of the scalenus anterior m, scalenus middle m, scalenus posterior m?

innervation?

Answer 5

move head to side
assist SCM in same side head rotation

cervical spinal n C4-C6
anterior rami of the cervical spinal n
cervical spinal n C4-c8

Question 6

innervation of the longus capitis and longus colli m?

Answer 6

anterior rami of the cervical spinal n c4-c8

anterior rami of the cervical spinal n c2-c6

Question 7

what are the innervations of the supra hyoid muscles?

Answer 7

digastric m 
-anterior belly - nerve to the mylohyoid
-posterior belly - facial nerve
stylohyoid m - facial nerve
mylohoid m - nerve to the mylohyoid
geniohyoid m - C1 of ansa cervicalis

Question 8

what are the innervations of the infra hyoid muscles?

Answer 8

sternohyoid m. ansa cervicalis c1-3
sternothyroid m. ansa cervicalis c2-c3
omohyoid m. ansa cervicalis c1-3
thyrohyoid m. CN XII

Question 9

what is the action of the corrugator supercilli m?

Answer 9

raise the eyebrows

Question 10

what is the action of the procerus m?

Answer 10

wrinkles the nose

Question 11

what is the action of the levator labii superioris aleque nasi m?

Answer 11

flares the nostrils and causes the lips to snarl

Question 12

what is the action of buccinator m?

Answer 12

pushes food to the back of the mouth

Question 13

what is the action of the mentalis m?

Answer 13

for pouting

Question 14

what are the origins for the intraocular eye muscles? all the same except for one, which one and what?

Answer 14

tendinous ring of zinn

inferior oblique muscle, maxilla of orbital floor

Question 15

action of frontalis?

Answer 15

Raises eyebrows, wrinkles forehead

Question 16

action of the procerus?

Answer 16

Draws down the medial angle of the eyebrow giving expressions of frowning

Question 17

action of the corrugator supercilii?

Answer 17

Wrinkles forehead

Question 18

action of the obicularis oculi?

Answer 18

closes eyelids

Question 19

action of the levator labii superioris alaeque nasi?

Answer 19

dilates the nostrils and snarls the upper lip

Question 20

action of the zygomaticus major?

Answer 20

draws angle of mouth upward and laterally

Question 21

action of the zygomaticus minor?

Answer 21

elevates upper lip

Question 22

action of the levator anguli oris?

Answer 22

Smile (elevates angle of mouth)

Question 23

action of the buccinator?

Answer 23

mastication

Question 24

action of the obicularis oris m?

Answer 24

pucker the lips.

Question 25

action of the depressor anguli oris?

Answer 25

Depresses angle of mouth

Question 26

action of the depressor labii inferioris?

Answer 26

Depression of the lower lips

Question 27

action of the mentalis?

Answer 27

elevates and wrinkles skin of chin, protrudes lower lip

Question 28

action of the platysma?

Answer 28

draws corner of the mouth and widens it