Face, TMJ

Question 1

orbicularis oculi

Answer 1

• palpebral part: gently shuts eye
• orbital part: forcefully shuts eye (wink)

Question 2

occipitofrontalis

Answer 2

wrinkles forehead, lifts eyebrows

Question 3

nasalis

Answer 3

• transverse part: comprises nasal aperture
• alar part: flares nostril

Question 4

procerus

Answer 4

draws down medial angle of eyebrow, produces horizontal wrinkle over nose

Question 5

depressor septi

Answer 5

pull nose inferiorly (bunny nose)

Question 6

depressor anguli oris

Answer 6

frown

Question 7

depressor labii inferioris

Answer 7

draws lower lip downward and laterally (partial cringe)

Question 8

mentalis

Answer 8

raises + protrudes lower lip

Question 9

corrugator supercilii

Answer 9

draws eyebrows medially and downward

Question 10

risorius

Answer 10

retracts corners of mouth (half-effort grin)

Question 11

zygomaticus

Answer 11

• major: smile (corners of mouth up and away)
• minor: draws upper lip upward (show teeth)

Question 12

orbicularis oris

Answer 12

closes + protrudes lips

Question 13

buccinator

Answer 13

presses cheek against teeth, compresses distended cheeks
like playing the bugle

Question 14

platysma

Answer 14

tenses skin of neck, can bring corners of mouth down

Question 15

masseter origin

Answer 15

zygomatic arch, maxillary process

Question 16

masseter insertion

Answer 16

lateral mandibular rami

Question 17

masseter innervation

Answer 17

masseteric n. from anterior trunk of mandibular n.

Question 18

masseter action

Answer 18

elevate mandible

Question 19

temporalis origin

Answer 19

temporal fossa

Question 20

temporalis insertion

Answer 20

coronoid process, mandibular rami

Question 21

temporalis innervation

Answer 21

deep temporal n. from anterior trunk of mandibular n.

Question 22

temporalis action

Answer 22

elevate + retract mandible

Question 23

medial pterygoid origin

Answer 23

• deep head: lateral plate of pterygoid process of sphenoid bone, palatine bone
• superficial head: tuberosity of maxilla, palatine bone

Question 24

medial pterygoid insertion

Answer 24

medial mandible near angle

Question 25

medial pterygoid innervation

Answer 25

nerve to medial pterygoid from mandibular n.

Question 26

medial pterygoid action

Answer 26

elevate + contralaterally deviate mandible

Question 27

lateral pterygoid origin

Answer 27

- upper head: roof of infratemporal fossa - lower head: lateral surface of lateral plate of pterygoid process

Question 28

lateral pterygoid insertion

Answer 28

capsule of TMJ near attachment to disc, pterygoid fovea on mandibular neck

Question 29

lateral pterygoid innervation

Answer 29

nerve to lateral pterygoid from anterior trunk of mandibular n., buccal branch

Question 30

lateral pterygoid action

Answer 30

protrude + contralaterally deviate mandible

Question 31

digastric origin

Answer 31

- anterior belly: digastric fossa on lower inside of mandible - posterior belly: mastoid notch, medial side of mastoid process

Question 32

digastric insertion

Answer 32

attachment of tendon b/w two bellies at hyoid body

Question 33

digastric innervation

Answer 33

- anterior belly: trigeminal n. (V3) of mandibular n. - posterior belly: facial n. (VII)

Question 34

digastric action

Answer 34

- anterior belly: opens mouth by lowering mandible, raises hyoid - posterior belly: pulls hyoid upward + back