Muscles of Fascial Expression

Question 1

Frontalis

Answer 1

O: Galea aponeurotica
I: Skin of eyebrows and root of nose
A: Raises eyebrows; wrinkles forehead
N: Facial Nerve (CN 7)

Question 2

Occipitalis

Answer 2

O: Occipital and temporal bone
I: Galea aponeurotica
A: Pulls scalp posteriorly
N: Facial nerve (CN 7)

Question 3

Orbicularis oculi

Answer 3

O: Frontal and maxillary bones
I: Tissue of the eyelid
A: Produces blinking, squinting, and draws eyebrows inferiorly
N: Facial nerve (CN 7)

Question 4

Buccinator

Answer 4

O: Maxilla and mandible
I: Orbicularis otis
A: Compresses cheek (whistling)
N: Facial nerve (CN 7)

Question 5

Orbicularis oris

Answer 5

O: Arises indirectly from the maxilla and mandible
I: Encircles the mouth, inserts onto skin and muscles at lateral corners of mouth
A: Closes the lips; purses and protrudes lips, as in whistling and kissing
N: Facial nerve (CN 7)

Question 6

Mentalis

Answer 6

O: Mandible
I: Skin of the chin
A: Protrudes lower lip; wrinkles the chin
N: Facial nerve (CN 7)