Anatomy Jaw Muscles

These muscles are the masseter the temporalis the medial pterygoid and the lateral pterygoid. It is controlled by four bilateral muscles in the face.

Medial And Lateral Pterygoid Muscle Anatomy And Function

The four main muscles of mastication attach to the rami of the mandible and function to move the jaw mandible.

Anatomy jaw muscles. The restructuring of the posterior jaw in mammals leads to the further replacement of this new muscle by the digastric which is a compound muscle made up of parts of the constrictors of the first and second branchial arches. During mastication three muscles of mastication musculi masticatorii are responsible for adduction of the jaw and one the lateral pterygoid helps to abduct it. Some physicians associate disorder in this joint with tiny myofascial trigger points or contractions knots in the overworked or traumatized jaw muscles.

Primary muscle discomfort is not really common but overuse as in chewing gum or in south africa biltong in association with disc malfunction can commonly causes jaw facial and sometimes neck pain as well as headache. Each of these muscles occurs in pairs with one of each muscle appearing on either side of the skull. Anatomy of the jaw.

Muscles and jaw movement opening inferior head of lateral pterygoid anterior digastric mylohyoid. Other muscles usually associated with the hyoid. The large muscle which raises the lower jaw and assists in mastication.

These muscles including the masseter and temporalis elevate the jaw forcefully during chewing and gently during speech. Hypobranchial muscles as the major jaw opening muscle. An extensive complement of tightly interlaced muscles allows the tongue a range of complex movements for chewing and swallowing as well as the important function of producing speech.

All four move the jaw laterally. There are four classical muscles of mastication. There are four muscles the masseter temporalis medial pterygoid and lateral pterygoid.

In regards to jaw anatomy the major joint in the jaw is the temporomandibular joint tmj which connects the lower jaw to the skull temporal bone under the ear. There are three kinds of tmj anatomy pain. The muscles work in combination to pivot the lower jaw up and down and to allow movement of the jaw from side to side.

The cardinal mandibular movements of mastication are elevation depression protrusion retraction and side to side movement. Closing masseter anterior and middle temporalis medial pterygoid. Protrusion bilateral contraction of the lateral pterygoid.

Retrusion middle and posterior temporalis possibly helped. Mastication or the act of chewing involves adduction and lateral motion of the jaw bone. The muscles of mastication are a group of muscles associated with movements of the jaw.

The Chewing Muscles Human Anatomy