ANATOMY

Detailed explanation-1: -The primary muscles include: Masseter. Temporalis. Lateral pterygoid.

Detailed explanation-2: -The mandibular nerve is the only branch of the trigeminal nerve with a motor component (V3). This branch supplies motor innervation to the facial muscles involved in mastication, which include the masseter, temporalis muscle, and lateral and medial pterygoids.

Detailed explanation-3: -The masseter lifts the lower jaw to close the mouth and it is the strongest muscle in your body. The temporalis helps close the mouth.

Detailed explanation-4: -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-5: -In anatomy, the temporalis muscle, also known as the temporal muscle, is one of the muscles of mastication (chewing). It is a broad, fan-shaped convergent muscle on each side of the head that fills the temporal fossa, superior to the zygomatic arch so it covers much of the temporal bone.