GROSS ANATOMY

Detailed explanation-1: -The function of the masseter muscle is to elevate the mandible and approximate the teeth-additionally, the intermediate and deep muscle fibers of the masseter function to retract the mandible. And the superficial fibers function to protrude the mandible.

Detailed explanation-2: -The masseter muscle provides powerful elevation and protrusion of the mandible by originating from the zygomatic arch and inserting along the angle and lateral surface of the mandible.

Detailed explanation-3: -The masseter is one of the four muscles of the masticatory apparatus. It elevates the mandible causing a powerful jaw closure. The contraction of the superior part, which runs diagonally to the front, moves the mandible forward (protrusion).

Detailed explanation-4: -The major function of the masseter muscle is to elevate the mandible, approximate the teeth.

Detailed explanation-5: -The medial pterygoid muscle is innervated by the medial pterygoid branch of the mandibular nerve. Its principal blood supply stems from the pterygoid branches of the maxillary artery. The major functions of this muscle are elevation of the mandible and side-to-side movements when grinding and chewing.