Origin: Zygomatic arch

Insertion: Angle of mandible

Action: Prime mover for jaw movement

Origin: Temporal fossa

Insertion: Coronoid process of mandible

Action: Closes jaw; retracts mandible (jaw closed at rest)

Origin: Sphenoid; perpendicular plate, medial surface

Insertion: Mandible

Action: Elevates jaw

Origin: Sphenoid; greater wing

Insertion: Condyle of mandible

Action: Protrudes mandible

Origin: Maxilla and mandible

Insertion: Oribcularis oris

Action: draws corner of mouth laterally