Head- Muscles of Facial Expression: Cheeks and Mouth

Question 1

Orbicularis oris

Answer 1

Origin: Skin, muscles around mouth
Insertion: lips
Action: closes lips

Question 2

Zygomaticus major

Answer 2

Origin: lateral zygomatic bone
Insertion: angle of the lips
Action: pulls lips laterally & superiorly

Question 3

Zygomaticus minor

Answer 3

Origin: Anterior zygomatic bone
Insertion: upper lip
Action: elevation of lips

Question 4

Levator labii superioris

Answer 4

Origin: infraorbital margin of maxilla
Insertion: upper lip
Action: elevates lips, flares nostrils

Question 5

Buccinator

Answer 5

Origin: Maxilla, mandible
Insertion: lips
Action: compress cheeks

Question 6

Risorius

Answer 6

O: lateral cheek
I: angle of lip
A: retracts lips

Question 7

Mentalis

Answer 7

O: body of mandible
I: lower lip
A: elevates, protrudes lip

Question 8

Depressor labi inferioris

Answer 8

O: Body of mandible
I: lower lip
A: depresses lips