#MuscleMonday! This is the Temporalis!
The Temporalis is located on each side of the head, just above the ears.
The Temporalis arises from the temporal fossa and the deep part of temporal fascia. It passes medial to the zygomatic arch and forms a tendon which inserts onto the coronoid process of the mandible, with its insertion extending into the retromolar fossa posterior to the most distal mandibular molar.
The temporalis can be divided into two functional parts; anterior and posterior.
- The anterior portion runs vertically and its contraction results in elevation of the mandible (closing the mouth).
- The posterior portion has fibers which run horizontally and contraction of this portion results in retraction of the mandible.