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Muscles of mastication

Temporalis O:Temporal Fossa. I: Coronoid process & ramus of mandible. A: Elevation and retraction of the mandible. N: Trigeminal nerve.
Masseter O: Superior- zygomatic process, inferior border of zygomatic arch. Deep- inferior border of zygomatic arch. I: Superficial- angle and ramus of mandible. Deep- superior ramus & coronoid process of mandible. A:Elevation, pro+ret of mandible(Clench teeth).
Lateral Pterygoid O: Superior- greater wing of sphenoid. Inferior- sphenoid bone. I: S- capsule/ articular disc of TMJ A: Protraction and depression of mandible (open jaw)
Medial Pterygoid O: Sphenoid bone, Palatine bone and pterygoid fossa. I: Inner surface of mandibular ramus and angle of mandible. A: Elevation of mandible (clench teeth). Lateral deviation of mandible. Protraction of mandible.
Created by: kietmany