Muscles of Mastication PDF
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Uploaded by Mastiff
University of the West Indies, Mona
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Summary
This document describes the muscles of mastication, specifically Masseter, Temporalis, Lateral Pterygoid, and Medial Pterygoid. It details their origins, insertions, nerve supply, and actions in the human body.
Full Transcript
Masseter Origin:zygomatic arch Insertion:ramus of mandible Nerve supply:masseteric nerve Actions:elevates mandible to close the mouth to bite Temporalis Origin:temporal fossa and temporal fascia Insertion:coronoid process&ramus of mandible Nerve supply:temporal branch of mandibular nerve Action:retr...
Masseter Origin:zygomatic arch Insertion:ramus of mandible Nerve supply:masseteric nerve Actions:elevates mandible to close the mouth to bite Temporalis Origin:temporal fossa and temporal fascia Insertion:coronoid process&ramus of mandible Nerve supply:temporal branch of mandibular nerve Action:retract the mandible Side to side grinding movement Lateral pterygoid Origin:infratemporal surface& lateral pterygoid plate Insertion:pterygoid fovea and capsule of the T.M joint N.S:anterior division of mandibular nerve Action:depresses the mandible and protrude the mandible Medial pterygoid Origin:tuberosity of maxilla& medial surface of lateral pterygoid plate Insertion:angle and ramus of mandible N.S:nerve to medial pterygoid Action:elevates mandible and protrudes it
