Muscles Origin, insertion and function

Muscle	Origin	Insertion	Action
Temporalis	Lateral surface of the temporal bone below the temporal line	Coronoid process and the anterior border of the ramus of the mandible	Elevation and retraction of the mandible
Masseter	Lower border of the anterior two-thirds of the zygomatic arch	Lateral surface of the ramus and angle of the mandible	Elevation of the mandible
Buccinator	Outer surfaces of the maxillae and mandible adjacent to the last molar teeth	Blend with orbicularis oris	Forms the substance of the cheeks
Orbicularis oris	Blends with itself around the mouth		Forms the greater part of the substance of the lips
Mentalis
Depressor labi inferioris
Depressor anguli oris
Levator labii superioris
Levator anguli oris
Zygomaticus major
Zigomaticus minor
Orbicularis oculi			Surrounds the opening of the orbit