MUSCLES OF MASTICATION - 3D
Channel: Air Tutor
Date: 2019-05-19

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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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