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The temporalis (Latin: musculus temporalis) is a wide, fan-shaped muscle located on each side of the skull. This muscle covers most of the temporal bone and fills the temporal fossa. The temporalis is one of the primary muscles of mastication involved in the elevation and retraction of the lower jaw. This muscle is covered by the temporal fascia.
|Temporal plane, temporal fascia
|Coronoid process of mandible
|Elevates mandible, retracts mandible (posterior fibers)
|Deep temporal nerve of mandibular nerve (CN V3)
|Deep temporal branches of maxillary artery, middle temporal branches of superficial temporal artery
The temporalis muscle originates from the temporal plane below the superior temporal line of the parietal bone and the deep surface of the temporal fascia.
The temporalis forms a tendon that inserts onto the coronoid process of the mandible.
Upon activation, the temporalis muscle elevates the mandible. It also can retract the mandible by pulling it backward with its posterior fibers.