Question 1

Which muscle is primarily responsible for elevating the mandible to close the jaw during chewing?

Accepted Answer

Masseter

Question 2

A patient is unable to raise their eyebrows or wrinkle their forehead. Which muscle is most likely affected?

Accepted Answer

Frontal belly of the epicranius

Question 3

During a clinical examination, a patient is asked to pucker their lips as if to whistle. Which muscle is primarily responsible for this action?

Accepted Answer

Orbicularis oris

Question 4

Which muscle is involved in both depressing the hyoid bone and the larynx during swallowing?

Accepted Answer

Sternohyoid

Question 5

A patient presents with difficulty turning their head to the left and flexing their neck. Which muscle is most likely impaired?

Accepted Answer

Sternocleidomastoid

Question 6

Which muscle is responsible for elevating and everting the upper lip, as seen in a 'snarling' facial expression?

Accepted Answer

Levator labii superioris

Question 7

If the right lateral rectus muscle is paralyzed, what movement of the right eye will be most affected?

Accepted Answer

Abduction

Question 8

Which muscle acts to compress the cheek, as in blowing or sucking?

Accepted Answer

Buccinator

Question 9

A patient is unable to elevate their hyoid bone during swallowing. Which muscle is most likely dysfunctional?

Accepted Answer

Geniohyoid

Question 10

Which muscle is responsible for elevating and retracting the mandible, and what is its origin?

Accepted Answer

Temporalis; origin: temporal fossa

Question 11

A patient presents with an inability to frown. Which muscle is most likely affected?

Accepted Answer

Depressor anguli oris

Question 12

Which muscle is responsible for elevating and abducting the eyeball?

Accepted Answer

Inferior oblique

Question 13

A patient is unable to open their mouth widely. Which muscle, acting to depress the mandible, may be impaired?

Accepted Answer

Digastric

Question 14

Which muscle is deep to the sternohyoid and acts to depress the hyoid and larynx?

Accepted Answer

Sternothyroid

Question 15

A patient presents with difficulty abducting their eye. Which muscle is most likely affected?

Accepted Answer

Lateral rectus

Question 16

Which muscle is responsible for elevating the corners of the mouth, as in smiling?

Accepted Answer

Zygomaticus major

Question 17

A patient is unable to compress their lips or pucker their mouth. Which muscle is most likely paralyzed?

Accepted Answer

Orbicularis oris

Question 18

Which muscle, when contracted, pulls the scalp posteriorly?

Accepted Answer

Occipital belly of the epicranius

Question 19

A patient is unable to elevate their upper eyelid. Which muscle is most likely NOT functioning properly?

Accepted Answer

Levator palpebrae superioris

Question 20

Which muscle is responsible for depressing the lower lip?

Accepted Answer

Depressor labii inferioris

Muscles of the Face, Throat, Neck, and Eye: Structure and Function

Study Guide - Practice Questions