Muscles of Mastication

Which branch of CN V innervates the muscles of mastication?

(a)  

The following are muscles of mastication except....

• Masseter

• Temporalis

• Medial pterygoid

• Buccinator

• Lateral pterygoid

The action of deep portion of masseter

• Retrude the mandible

• protrude the mandible

• Elevates the mandible

• Mandible is raised vertically

The masseter originated from the _______ and inserts to the lateral surface of _______ of mandible

(a)  

It is active only when working together with the elevator muscles.

• superior lateral pterygoid

• anterior portion of temporalis

• medial pterygoid

• deep portion of masseter

The 3 distinct areas of temporalis:

• Anterior

• Middle

• Superficial

• Posterior

The anterior portion of the the temporalis raises the mandible vertically. [True, False]

• TRUE

• FALSE

The superficial portion of masseter is consists of fibers that are directed almost vertically [True, False]

• TRUE

• FALSE

Inferior lateral pterygoid is active when opening. [True, False]

• TRUE

• FALSE

The medial pterygoid muscle (a)   (elevates, protrudes) the mandible in a unilateral contraction