Masseter

anatomy-modell-muscle-head-6013-edited-2Muscle Origin

Maxilla and zygomatic arch to angle and ramus of mandible

The Zygomatic arch is the jugal point and is the point at the anterior end of the upper border of the zygomatic arch where the masseteric and maxillary edges meet at an angle.

Insertion

Coronoid process, ramus of mandible, cementomaxillary tendon and cementomandibular tendon

Action

Elevation (as in closing of the mouth) and protraction of mandible

Innervation – Nerve control

Mandibular nerve (V3)

Along with the other three muscles of mastication (temporalis, medial pterygoid, and lateral pterygoid), the masseter is innervated by the mandibular division (V3) of the trigeminal nerve. The innervation pathway is: gyrus precentralis > genu capsula interna > nucleus motorius nervi trigemini > nervus trigeminus > nervus mandibularis > musculus masseter. Wiki

Artery

Masseteric artery

The masseteric artery is small and passes laterally through the mandibular notch to the deep surface of the masseter muscle, which it supplies. Wiki

Pictures of muscles

 

Trigger Point Referrals

 

Stretching description

 

Exercises

 

Injuries

 

Treatment

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