MUSCLES OF MASTICATION - 3D

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🎞20 anatomical landmarks of mandible video: https://bit.ly/2YcBWS9

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Masseter:

Superficial Head:
ORIGIN: Anterior border Zygomatic arch
INSERTION: Angle and ramus of mandible (Inferior surface)

Deep Head:
ORIGIN: Posterior border of the zygomatic arch
INSERTION: Superior surface of the ramus
ACTION: Elevation and adduction of mandible
NERVE SUPPLY: Masseteric nerve (Vc)
Temporalis:
ORIGIN: Temporal Fossa, deep temporal fascia
INSERTION: Corronid process of the mandible
ACTION: Elevation and retraction of the mandible
NERVE SUPPLY: Deep temporal nerve (Vc)
Medial pterygoid:

Superficial Head:
ORIGIN: Maxillary tuberosity & pyramidal process of palatine bone
INSERTION: Medial surface of ramus $ angle

Deep Head:
ORIGIN: Medial surface of lateral pterygoid plate
INSERTION: Medial surface of ramus $ angle
ACTION: Elevates mandible and side to side movement
NERVE SUPPLY: Nerve to medial pterygoid (Vc) (Main trunk)
Lateral pterygoid:

Superior Head:
ORIGIN: Greater wing of sphenoid bone
INSERTION: Anterior aspect of mandibular condyle (anterior part of the TMJ disc)

Inferior Head:
ORIGIN: Lateral surface of lateral pterygoid plate
INSERTION: Anterior aspect of mandibular condyle
ACTION: Depresses the mandible
NERVE SUPPLY: Nerve to Lateral pterygoid (Vc)

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