The masseter is a three bellied muscle on the lateral jaw. It is often regarded as having the strongest muscle fibers in the body.
Origin: The anterior two-thirds of the zygomatic arch along the maxilla and temporal bones,
Insertion: The anterior belly attaches along the anterior surface of the mandible in front of the attachment of the deep belly. The posterior belly attaches to the surface of the ramus behind the attachment of the deep belly
Origin: The posterior third of the zygomatic arch along the zygomatic process of the temporal bone.
Insertion: The lateral surface of the coronoid process of the mandible.
Function: Elevate the mandible and close the jaw.
This site is undergoing changes. Starting in early 2020, we began changing the format of the posts to include more extensive self-care, illustrations, therapist notes, anatomy, and protocols. We appreciate your input and feedback. You will see us adding posts and updating older posts as time permits.
Tony Preston has a practice in Atlanta, Georgia where he sees clients. He has written and taught about anatomy, trigger points, and cranial therapies since the mid-90s.
*This site is undergoing major changes. We are reformatting and expanding the posts to make it easier to read, more accessible, and
to include more patterns with better self-care. In the meanwhile, there will be inconsistency in formatting, content, and readability until we get the old posts updated. Please excuse our mess.