Muscles Facial and Neck IN, A, O, I

Question 1

Levator Palpebrae superioris

Action and innervation

Answer 1

Elevates and retracts the upper eyelid

Oculomotor nerve CN III

Question 2

Elevates and retracts the upper eyelid

Oculomotor nerve CN III

Answer 2

Compresses cheeks during mastication and sucking

Branch of facial nerve CN VII

Question 3

Platysma

Action and Innervation

Answer 3

A: Depress lower jaw

IN Branch of facial nerve CN VII

Question 4

The Zygomaticus Major NOTE: Cheek dimples are due to a ____ (split/double) Zygomaticus Major

Answer 4

bifid

Question 5

Zygomaticus Major

Action and Innervation

Answer 5

A draws the angle of the mouth laterally and upward (as a smile)
IN: Branch of facial nerve CN VII

Question 6

Occipitofrontalis (Frontalis and Occipitalis)
The Frontalis A/IN
the Occipitalis A/IN

Answer 6

A:Draws the scalp anteriorly; raises eyebrows and skin over nose and eyes
IN: CN VII

A:Draws scalp posteriorly
IN: Branch of facial nerve CN VII

Question 7

Orbicularis oris

Action and Innervation (Superficial and Deep portion)

Answer 7

Superficial: closes lips, protrudes lips (kiss)
Deep portion presses lips against teeth
IN = Branch of the facial Nerve CN VII
Branch of facial nerve CN VII

Question 8

Orbicularis Oculi:

Action and Innervation

Answer 8

Action Closes Eyelid (wink)

Branch of facial Nerve CN VII