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.

Detailed explanation-2: -Masseter. The masseter muscle is one of four muscles of mastication and has the primary role of closing the jaw in conjunction with two other jaw closing muscles, the temporalis and medial pterygoid muscles.

Detailed explanation-3: -The medial pterygoid muscle functions to assist with elevation and protrusion of the mandible. It also assists the lateral pterygoid muscle with side to side mandibular motion to help with the grinding of food.

Detailed explanation-4: -Closing is produced by three large muscles on each side, the medial pterygoid, the temporalis, and the masseter.

Detailed explanation-5: -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.