Muscles of Mastication Flashcards
1
Q
What is the action of the Masseter?
A
Elevate mandible (strongest muscle in the body)
2
Q
What is the action of the Temporalis?
A
Elevate and retract the mandible
3
Q
What is the action of the Medial Pterygoid?
A
Elevate and contralaterally deviate mandible
4
Q
What is the action of the Lateral Pterygoid?
A
Protrusion and contralaterally deviate mandible
5
Q
What is the action of the Digastric?
A
Anterior Belly- opens mouth by lowering mandible and raises hyoid
Posterior Belly- pulls hyoid upward and back
6
Q
DIGASTRIC HAS 2 INNERVATIONS
A
Anterior Belly- trigeminal nerve (CN V 3) - mandibular nerve
Posterior Belly- facial nerve (CN VII)
