Superficial Face

Question 1

buccinator innervation

Answer 1

facial nerve CN VII

Question 2

buccinator action

Answer 2

presses cheek against molar teeth
works with tongue to keep food between occlusal surfaces and out of oral vestibule
resists distension (when blowing)

Question 3

orbicularis oculi innervation

Answer 3

facial nerve CN VII

Question 4

orbicualris oculi action

Answer 4

closes eyelids

Question 5

orbicularis oris innervaiton

Answer 5

facial nerve CN VII

Question 6

orbicualris oris action

Answer 6

tonus closes mouth
phasic contraction compresses and protrudes lips (kissing)
resists distension (when blowing)

Question 7

masseter O

Answer 7

inferior border and medial surface of maxiallry process of zygomatic bone and the zygomatic arch

Question 8

masseter i

Answer 8

angle and lateral surface of ramus of mandible

Question 9

masseter innervation

Answer 9

anterior trunk of mandibular nerve CN V3 - via masseteric nerve

Question 10

masseter action

Answer 10

elevates mandile

superficial fibers make limited contribution to protrusion of mandible

Question 11

temporalis O

Answer 11

broad attachment to floor of temporal fossa and deep surface of temporalis fascia

Question 12

temporalis I

Answer 12

narrow attachment to tip and medial surface of coronoid process

anterior border of ramus of mandible

Question 13

temporalis innervation

Answer 13

anterior trunk of mandibular nerve CN V3 via deep termporal nerve

Question 14

temporalis action

Answer 14

elevates mandible, closing jaws

posterior mor horizontal fibers are retractors of mandible

Question 15

medial ptrerygoid O

Answer 15

quadrangular two headed muscle

• medial surface of lateral pterygoid plate and pyramidal process of palatine bone
• tuberosity of maxilla

Question 16

medial pterygoid I

Answer 16

medial surface of ramus of mandible

inferior to mandibular foramen

Question 17

medial pterygoig innervation

Answer 17

anterior trunk of mandibular nerve CN V3, via nerve to medial pterygoid

Question 18

medial pterygoid action

Answer 18

acts synergistically with masseter to elevate mandible
contributes to protrusion
alternate unilateral activity produces smaller grinding movements

Question 19

lateral pretygoid O

Answer 19

twiangular two headed muscle

• infratemporal surface of crest of greater wing of sphenoid
• lateral surface of lateral pterygoid plate

Question 20

lateral pterygoid I

Answer 20

superior head attaches primarily to joint capsule and articualr disc of TMJ

inferior head attaches primarily to pterygoid fovea on anteromedial aspect of neck of condyloid process of mandible

Question 21

lateral pterygoid innervation

Answer 21

anterior trunk of mandibular nerve CN V3 via nerves to lateral pterygoid

Question 22

lateral pterygoid action

Answer 22

acting bilaterally: protracts mandible and depreses chin

unilaterally: swings jaw towards contralateral side, alternate unilateral contraction produces larger lateral chewing movements

Question 23

Occipital frontalis action and innervation

Answer 23

Elevates eyebrows / wrinkles skin of forehead

Innervated by facial nerve