muscular system week 1 (face, head and neck muscles)

Question 1

frontalis

Answer 1

location: muscles that overlies the cranium
action: raises the eyebrows

Question 2

what connects the frontalis and occipitalis

Answer 2

an aponeurosis

Question 3

occipitalis

Answer 3

location: muscle that overlies the cranium
action: draws scalp posteriorly

Question 4

orbicular oris

Answer 4

location: circular muscle that encircles the mouth
action: puckers the mouth as in kissing

Question 5

orbicularis oculi

Answer 5

location: circular muscle that encircles each eye
action: closes each eye as in blinking

Question 6

zygomaticus major

Answer 6

location: originates on the zygomatic bone and inserts on the skin at the corners of the mouth
action: pulls the corners of the mouth superiorly as in smiling

Question 7

zygomaticus minor

Answer 7

location: originates on the zygomatic bone and inserts on the upper lip
action: elevates upper lip, exposes upper teeth

Question 8

platysma

Answer 8

location: originates on the fascia of the chest and deltoid and inserts on the mandible and skin below the mouth
action: depressed the lower lip and mandible, tenses neck skin

Question 9

temporalis

Answer 9

location: originates on the temporal bone and inserts on the mandible
action: elevates and retracts the mandible

Question 10

masseter

Answer 10

location: originates on the temporal bone and inserts on the mandible
action: elevates, protracts and retracts the mandible

Question 11

sternocleidomastoid

Answer 11

location: originates on the sternum and clavicle and inserts on the mastoid process of the temporal bone
action: if one side contracts, the head rotates to the opposite side. if both contract, flexion of the head is the result