What Cranial Nerve Innervates All Four Major Muscles of Mastication

question 76

Multiple Choice

What cranial nerve innervates all four major muscles of mastication?

• A)trigeminal (CN V)
• B)facial (CN VII)
• C)vagus (CN X)
• D)spinal accessory (CN XI)

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Definitions:

Manubrium

The upper portion of the sternum to which the clavicle and first ribs attach.

Sternum

The long, flat bone located in the center of the chest, connecting to the ribs via cartilage and forming the front part of the rib cage.

Humerus

The long bone in the upper arm that runs from the shoulder to the elbow, connecting with muscles and joints to facilitate arm movement.

Articulates

Pertains to how bones connect or join together at joints to allow for movement.