Muscles of Mastication (Chewing)
The primary muscles of mastication are the masseters, temporalis, medial pterygoid, and lateral pterygoid muscles.

The four main muscles of mastication attach to the rami of the mandible (Jaw) and function to move the mandible.

The mandibular movements of mastication are elevation, depression, protrusion, retraction and side to side movement.

The muscles of mastication move the mandible in a side-to-side motion to assist in the grinding of food.

The muscles of mastication also function to approximate the teeth.

The platysma muscle assists with depression of the mandible against resistance.

The accessory muscles of mastication are the buccinator, suprahyoid muscles (digastric muscle, mylohyoid muscle and geniohyoid muscle) and infrahyoid muscles (sternohyoid, sternothyroid, thyrohyoid and omohyoid muscle).

The primary and accessory muscles of mastication work in a coordinated fashion to produce mandibular movement for chewing food.

Dr Donald A Ozello DC of Championship Chiropractic in Las Vegas, NV
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