Overview

muscles of mastication


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A group of muscles which act together to produce a coordinated movement of the mandible during chewing. They are innervated by the mandibular branch of the trigeminal nerve. The muscles consist of the temporalis, masseter, medial pterygoid, lateral pterygoid, and digastric. During mastication they act in conjunction with each other.

The functions of the muscles of mastication

Muscles involved

Jaw action

Lateral pterygoid

Digastric

Opening

Temporalis

Masseter (superficial head)

Closing

Masseter (superficial head)

Lateral pterygoid

Medial pterygoid

Protrusion

Temporalis

Masseter (deep head)

Retrusion

Temporalis on the same side

Masseter

Pterygoid muscles on the one side move the jaw to the opposite side

Chewing

Subjects: Dentistry.


Reference entries

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