Muscles of the Face

Question 1

Orbicularis oris

Answer 1

comprises intertwined fibers, forms a ring around the lips and when contracted, contributes to opening and closing of the lips, puckering, and vertical or lateral movements of the lips.

Question 2

Buccinator

Answer 2

Inserts into the upper and lower lip; forms part of the cheek wall, and contraction produces tension that pulls the cheek against the teeth

Question 3

Risorius

Answer 3

Originates from masseter muscle and inserts at the angle of the mouth; contraction retracts the angle of the mouth

Question 4

Zygomatic minor

Answer 4

contraction pulls the corners of the mouth upward

Question 5

zygomatic major

Answer 5

originates from zygomatic bone and inserts into the corner of the mouth; contraction draws the corners of the mouth backward, simultaneously lifting and pulling the corners of the mouth sideways

Question 6

depressor labii inferioris

Answer 6

originates from teh anterior surface of the mandible; contraction depresses and turns the lower lip outward

Question 7

Mentalis

Answer 7

originates from the mandible inferior to the incisor teeth and courses downward into the chin; Contraction forces curling of the lip

Question 8

Levator anguli oris and depressor anguli oris

Answer 8

draw the corners of the mouth up and down, respectively. Contraction of each of these muscles can also draw the lips together

Question 9

incisivus labii superioris and incisivus labii inferoris

Answer 9

contraction pulls the corners of the mouth upward or downward toward the midline

Question 10

platysma

Answer 10

Broad, superficial muscles with infra and supraclavicular origins; contraction can depress the lower lip and corners of the mouth or produce a vertical wringkling of the skin of the neck as the skin of the neck is drawn toward the mandible.