Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
masticatory muscle of posterior cheek; origin, superficial part: inferior border of the anterior two thirds of the zygomatic arch; deep part: inferior border and medial surface of the zygomatic arch; insertion, lateral surface of ramus and coronoid process of the mandible; action, elevates mandible (closes jaw); nerve supply, masseteric branch of mandibular division of trigeminal.
Synonym(s): musculus masseter [TA]
A thick muscle in the cheek that closes the jaws during chewing.
mas′se·ter′ic (măs′ĭ-tĕr′ĭk) adj.
masseterThe major jaw muscle, which participates in protraction, retraction and side to side movement of the jaw.
Mandibular branch of trigeminal.
Origin, superficial part
Zygomatic process of maxilla, inferior border of zygomatic arch.
Origin, deep part
Inferior border and medial suface of zygomatic arch.
Insertion, superficial part
Angle, ramus of mandible.
Insertion, deep part
Superior ramus, lateral coronoid process of mandible.