Masseter

  • The masseter (also masseter muscle, latin: musculus masseter) is a masticatory muscle that elevates the lower jaw and originates from zygomatic arch and inserts into the masseteric tuberosity of the mandible. The masseter muscle is thick and quadrangular in shape. 

    Origin

    The masseter originates from the zygomatic arch.

    Insertion

    The masseter muscle inserts onto the masseteric tuberosity of the mandible. 

    Action

    Contractions of the masseter muscles elevate the mandible.

    Innervation

    The masseter is innervated by the masseteric nerve, a branch of the mandibular division of the trigeminal nerve (CN V3).