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 primary muscles of mastication (chewing food) are the temporalis, medial pterygoid, lateral pterygoid, and masseter muscles. The four main muscles of mastication attach to the rami of the mandible and function to move the jaw (mandible).

Detailed explanation-3: -The facial muscles involved in chewing are: Buccinator, a thin muscle in your cheek that holds each cheek toward your teeth. Lateral pterygoid, a fan-shaped muscle that helps your jaw open. Masseter, a muscle that runs from each cheek to each side of your jaw and helps your jaw close.

Detailed explanation-4: -The masseter is one of the muscles of mastication. It is a powerful superficial quadrangular muscle originating from the zygomatic arch and inserts along the angle and lateral surface of the mandibular ramus. The masseter is primarily responsible for the elevation of the mandible and some protraction of the mandible.