Mastication

Question 1

What is the insertion of the temporalis muscle?

Answer 1

Coronoid process of the mandible.

Question 2

The posterior fibers of the temporalis muscle:

1. Elevate
2. Protract
3. Retract

Answer 2

Retract. The anterior fibers elevate the mandible.

Question 3

Which muscle does not elevate the mandible?

1. Masseter
2. Temporalis
3. Medial Pterygoid
4. Lateral Pterygoid

Answer 3

Lateral Pterygoid

Question 4

Which muscle inserts onto the consuls and articular disc?

1. Masseter
2. Temporalis
3. Medial Pterygoid
4. Lateral Pterygoid

Answer 4

Lateral Pterygoid

Question 5

What are the three movements of the TMJ joint?

Answer 5

Rotation, translation, and side to side movement.

Question 6

Which muscle is involved with the first step of mastication?

1. Temporalis
2. Masseter
3. Medial Pterygoid
4. Lateral Pterygoid

Answer 6

Lateral Pterygoid. It depresses and then protrudes the Mandibular condyle.

Question 7

What two muscles do the V3 nerve innervate that are involved with mastication?

Answer 7

Mylohyoid and anterior digastric

Question 8

Which step of mastication is the TMJ at risk?

Answer 8

The second step in which the Mylohyoid and the anterior digastric can depress the mandible.

Question 9

With this chewing, the condyle a rotate forward on both sides and depress the mandible symmetrically.

1. Incisal
2. Side to side

Answer 9

Incisal

Question 10

Which nerve provides motor to the tongue?

Answer 10

Hypoglossal CN 12. It arises from the medulla.

Question 11

A lesion of the hypoglossal nerve affects the muscle on

1. Contralateral side
2. Ipsilateral side

Answer 11

Ipsilateral side