Musculature of the Mouth

Question 1

What facial muscle will be present in both the upper and lower lip?

Answer 1

orbicularis oris

Question 2

What facial muscle will act to close the mouth and to purse and protrude the lips?

Answer 2

orbicularis oris

Question 3

What is the innervation of the orbicularis oris?

Answer 3

buccal (upper lip) and mandibular (lower lip) branches of the facial nerve

Question 4

Which facial muscle is attached to the alveolar processes of the maxillary and mandibular molar teeth and to the muscles at the side of the mouth?

Answer 4

buccinator

Question 5

What facial muscle acts to compress the cheeks against the teeth?

Answer 5

buccinator

Question 6

What is the innervation of the buccinator?

Answer 6

buccal branches of the facial nerve

Question 7

What facial muscle is attached to the parotid fascia and the skin at the corner of the mouth?

Answer 7

risorius

Question 8

What facial muscle acts to draw back the angle of the mouth?

Answer 8

risorius

Question 9

What is the innervation of the risorius?

Answer 9

buccal and mandibular branches of the facial nerve