Temporalis

The temporalisTemporalis Elevator / Jaw closer Covers the sides of your head; helps you bite or clench your teeth. is a primary muscle of masticationThe process of chewing food to break it down into smaller pieces.. It works with the masseterMasseter Elevator Jaw closer Runs along the jaw; raises the mandible to close your mouth. and other muscles. Together, they help you “chew your food before you swallow!” (said every mother to their child).

Temporalis Origin

The temporalis muscle begins at the temporal fossa, which is a shallow depression on the side of the skull. This structure provides a large surface area for the origin of the temporalis. The muscle fibers converge as they descend. They form a tendon that passes beneath the zygomaticCheekbones; form lateral walls of orbits and connect to temporal bones via zygomatic process. arch.

Temporalis Insertion

The temporalis muscle then inserts into the coronoid processTriangular projection on mandible’s upper front edge for muscle attachment; in front of the condyl. It also inserts into the anteriorThe front of the body or toward the front when standing in the anatomical position. border of the ramus of the mandibleLower jawbone; only movable bone of the skull; U-shaped and largest facial bone.. This insertion point allows the temporalis to exert significant force on the mandible. It is one of the strongest muscles involved in jaw movementA fundamental property of life involving motion of the body or its parts..

Temporalis Actions

Elevation of the Mandible

Retraction of the Mandible

Maintaining the Position of the Jaw at Rest