masseter muscle


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Related to masseter muscle: temporalis muscle

masseter

The major jaw muscle, which participates in protraction, retraction and side to side movement of the jaw.

Action
Closes jaw.
 
Nerve
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.

mas·se·ter mus·cle

(masĕ-tĕr mŭsĕl)
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] .

mas·se·ter mus·cle

(masĕ-tĕr mŭsĕl)
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] .
References in periodicals archive ?
Results showed that one month later 40 cm3 decreases was identified in the hypertrophic masseter muscle, after two months 90 cm3 decreases in the masseter volume and three months later 80 cm3 decreases was seen.
The method of wax occlusal rims can even worsen the condition of the edentulous patients, with an undetected, disharmonic tension of the masseter muscles (Figures 17 and 18).
The patient underwent surgery involving bilateral resection of mandibular angles and unilateral resection of the masseter muscle through intraoral and extraoral submandibular approaches.
It was injected into the masseter muscles bilaterally under electromyography guidance and midazolam sedation.
Although IMH most commonly arises from the masseter muscle in the head and neck region, other sites of origin are the trapezius, periorbital, sternocleidomastoid, and temporal muscles (2).
Yu, "Masseter muscle changes following orthognathic surgery: A long-term three-dimensional computed tomography follow-up," Angle Orthodontist, vol.
Regional differences of metabolism in human masseter muscle by two-dimensional 31-p-chemical shift imaging.Journal of Dental Research, 79(1), 85-89.
Lip vibrations in such a small funnel-shaped mouthpiece demand precision in the contraction of the orbicular oral muscle (around the lips) and the muscles that raise and lower the mandible, such as the masseter muscle.
The %MVC of the masseter muscle was 46.1 [+ or -] 16.5% in the BW-SM group, 35.9 [+ or -] 5.1% in the BW-LM group and 4.3 [+ or -] 7.2% in NW group, with significantly higher results in the BW-SM group (p < 0.05) than in the NW group.
Computed tomography (CT) showed a large, calcified nodule before the anterior border of the masseter muscle within the markedly dilated parotid duct (figure, A).
The aims of the present study were (i) to examine the effect of exercise intensity on EMG activity of two facial muscles and to examine whether EMG activity reflects the perception of effort as well as involved muscle activity during incremental workload cycling exercise and (ii) to determine the correlations between EMG activity of corrugator supercilii (CS) muscle (associated with frowning), that of the masseter muscle (associated with chewing), that of the vastus lateralis (VL) muscle, HR and RPE during incremental workload cycling exercise.
The masseter muscle covering the lateral side of the joint was composed of three sections; the temporal muscle covering the cranial side of the joint was composed of one section; the lateral pterygoid muscle covering the medial part was made up of two sections; and the medial pterygoid muscle which didn't surround the joint was also made up of two sections.