Muscle Lab Quiz: Head & Neck

Question 1

frontalis

Answer 1

O: galea aponeurotica
I: skin of eyebrow and root of nose
A: raise brows, wrinkle forehead
Innervation: facial nerve (CN VII)

Question 2

occipitalis

Answer 2

O: occipital and temporal bone
I: Galea aponeurotica
A: pulls scalp posteriorly
Innervation: facial nerve (CN VII)

Question 3

orbicularis oculi

Answer 3

O: frontal and maxillary bones
I: tissue of the eyelid
A: produces blinking/ squinting/ draws eyebrows inferiorly
innervation: facial nerve (CN VII)

Question 4

Buccinator

Answer 4

O: maxilla and mandible
I: orbicularis oris
A: compresses the cheek (as in whistling)
Innervation: facial nerve (CN VII)

Question 5

orbicularis oris

Answer 5

O: arises indirectly from the maxilla and mandible
I: encircles the mouth, inserts onto skin and muscles at the lateral corners of mouth
A: closes the lips; purses and protrudes the lips, as in whistling and kissing
Innervation: facial nerve (CN VII)

Question 6

mentalis

Answer 6

O: mandible
I: skin of the chin
A: protrudes lower lip; wrinkles the chin
innervation: facial nerve (CN VII)

Question 7

masseter

Answer 7

O: zygomatic arch
I: mandible
A: elevates mandible
innervation: trigeminal nerve (CN V)

Question 8

temporalis

Answer 8

O: occipital and temporal bone
I: mandible
A: elevates mandible
innervation: trigeminal nerve (CN V)

Question 9

sternocleidomastoid

Answer 9

O: sternum and clavicle
I: mastoid process of the temporal bone
A: acting together flex the head; acting alone rotates head toward the opposite shoulder
innervation: accessory nerve (CN XI)