O: temporal lines (front and parietal) and temporal fossa (frontal, sphenoid, malar, parietal, temporal)

I: coronoid process and anterior border of mandibular ramus

A: elevation of mandible (closing mouth)

O: zygomatic arch

I: lateral surface of mandibular ramus and gonial angle

A: elevate + protract mandible

O: Medial surface of lat. pterygoid plate (shenoid), palatine, lateral surface of maxilla

I: medial surface of mandibular ramus and gonial angle

A: elevate mandible (close mouth)

O: lateral surface of lateral pterygoid plate and greater wing

I: mandibular neck (below condyle) and articular disc and capsule of TMJ

A: side to side movement of mandible