Masseter Muscle: Anatomy, Origin, Insertion, Function

Masseter Muscle: Anatomy, Origin, Insertion, Function

Discuss the origin, insertion, nerve supply and action of masseter muscle.
Answer.

Masseter Muscle Origin

Superficial part: From the anterior two-third of the lower border of zygomatic arch and adjoining part of zygomatic process of maxilla.

Masseter Muscle Anatomy

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Deep part: From the inner surface of zygomatic arch.

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Masseter Muscle  Insertion

Into the outer surface of the ramus of mandible.

Masseter Muscle  Nerve supply

Masseteric nerve from the anterior division of the mandibular nerve.

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Masseter Muscle – Origin, Insertion, Nerve Supply

Masseter Muscle  Action

Elevation of mandible to close the mouth (as required during biting).