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The Probert Encyclopaedia of Medicine

TEMPORALIS

The temporalis muscle is a flat, fan-shaped muscle situated at the side of the head. It arises in the temporal fossa and fills the depression on the side of the skull, inserting on the coronoid process of the mandible (jaw bone) and the front edge of the ramus of the mandible. The fibres of the temporalis converge as they descend, and end in a tendon which passes through the gap between the zygomatic arch and the side of the skull. The temporalis is innervated by deep branches of the trigeminal nerve and is supplied by deep branches of the temporal artery. The temporalis is the muscle that pulls the jaw upward, which closes the jaw, and helps when chewing. It is an important muscle for chewing and speaking.
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