what muscle originates on the temporal fossa
temporal muscle. n. A muscle with origin from the temporal fossa, with insertion into the anterior border of the ramus and the mandible, with nerve supply from the deep temporal branches of the mandibular division of the trigeminal nerve, and whose action closes the jaw.rigin, temporal fossa; insertion, coronoid process of mandible and anterior border of ramus; action, elevates mandible (closes jaw); its posterior, nearly horizontally-oriented fibers are the primary retractors of the protruded mandible; nerve supply, deep temporal branches of mandibular division of trigeminal.