Temporalis Muscle - Attachments, Actions & Innervation
Masseter Muscle – Attachments, Actions & Innervation
The masseter is a thick, powerful muscle of mastication that functions to close the jaw and make the teeth bite down.
Attachments of Masseter Muscle: Origin & Insertion
Origin: (proximal attachments):
Zygomatic arch (medial surface and inferior border).
Insertion: (distal attachments):
Lateral surface of angle and ramus of mandible.
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Actions of Masseter Muscle on the mandible:
Elevates and protracts (protrudes) mandible to close jaw.
Nerve to Muscle and its Spinal Segment:
Mandibular branch of trigeminal nerve (V).
Muscles of Mastication