Massage & Bodywork

SEPTEMBER | OCTOBER 2020

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C h e c k o u t A B M P 's P o c k e t P a t h o l o g y a t w w w. a b m p . c o m / a b m p - p o c k e t - p a t h o l o g y - a p p . 31 FUNCTIONAL ANATOMY education The masseter is a thick, strong muscle and typically the most prominent muscle of the jaw. It is located between the zygomatic arch and the mandible and has two parts. The larger, more superficial segment originates from a thick aponeurosis at the zygomatic process of the maxilla and the anterior two-thirds of the lower edge of the zygomatic arch. Dense fibers extend inferiorly and posteriorly then insert at the angle and lower half of the lateral surface of the mandible. The smaller, deeper segment originates at the posterior third of the lower border and entire medial surface of the zygomatic arch. This portion is more muscular in texture than its counterpart. The deep fibers extend inferiorly and anteriorly to insert at the upper half of the ramus and lateral surface of the coronoid process of the mandible. Masseter By Christy Cael MASSETER Attachments • Origin: Zygomatic process of the maxilla and zygomatic arch of the temporal and zygoma bones • Insertion: Angle, ramus, and lateral surface of the mandible Actions • Elevates the mandible Innervation • Mandibular division of the trigeminal nerve

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