Muscles of facial expression

Question 1

Lips

Answer 1

upper lip - Cupid’s bow
vertical gully - philtrum
tissue that attaches behind lips to gums - labial frenums

Question 2

Orbicularis oris

Answer 2

major muscle of lips,
Origin/insertion circles lips,
action - lips constrict on contract

Question 3

Buccinator

Answer 3

Origin - pterygomandibular ligament
insertion - orbicularis oris at corner
action - sucks in cheeks an lifts corner of mouth

Question 4

Risorius

Answer 4

origin - fascia of masseter muscle
insertion - orbicularis otis
action - retract lips at corner

Question 5

Levator Labii superior

Answer 5

Origin - 3 heads - angular head, infraorbital head, zygomatic head
Insertion - orbicularis oris
action - upper lip lifts - smiling

Question 6

Zygomatic

Answer 6

origin - lateral of zygomatic head
insertion - orbicularis oris
action - helps to smile

Question 7

Levator anguli oris

Answer 7

origin - maxilla
insertion - orbicularis oris
action - moves corner of lips up and medial

Question 8

Depresor labii inferior

Answer 8

origin - oblique lines of mandible
insertion - orbicularis oris
action - pulls lips down and lateral

Question 9

Depressor anguli oris

Answer 9

origin - oblique line of mandible
insertion - orbicularis oris
action - pulls corners of mouth down

Question 10

Incisivis labii superior

Answer 10

parallel to upper lip
origin - maxilla, near midline
insertion - orbicularis oris corner of mouth
action - draws corners medially and up

Question 11

Incisivis labii inferior

Answer 11

mirror image of superior, lower lip
orign - mandible midline
insertion - corner of mouth
action - draws corner medial and down

Question 12

Mentalis

Answer 12

origin - madible
insertion - oribicularis oris
action - lower lip pulled down (pouting), elevate chin

Question 13

Platysm

Answer 13

neck muscle
origin - fasia of pectoralis major
insertion - corner of mouth
action - lower the mandible, lower the lip