Masticatory Muscles


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Related to Masticatory Muscles: Muscles involved in mastication

Masticatory Muscles

 

a group of four paired muscles in man and animals, providing movement of the lower jaw (mandible) during mastication. The masseter muscle, or the masticatory muscle proper, originates from the zygomatic arch and the temporal fascia and attaches to the angle of the mandible. The temporal muscle, originating from the temporal bone and the temporal fascia, attaches to the coronoid process of the mandible. The pterygoideus internus and externus muscles are deeperlying, originating from the sphenoid bone at the base of the skull; the former attaches to the neck of the condyloid process of the mandible, and the latter to the interior surface of the angle of the mandible.

In addition to providing masticatory movement, the masticatory muscles work with the mimetic muscles to articulate speech, facial expression, and yawning. Several neck muscles—the geniohyoid, mylohyoid, and digastric—also provide movement during mastication. Blood is supplied to the masticatory muscles by branches of the carotid artery. Innervation is provided by the third branch of the trigeminal nerve.

References in periodicals archive ?
Key Words: Masticatory muscles, Pterygoid Muscles, Temporomandibular Joint, Temporomandibular joint disorders.
Electromyography of the perioral and masticatory muscles in children with malocclusion, incompetent lips and atypical swallowing--part II.
Future studies should include additional factors such as stress distribution, bone density, and masticatory muscle effects.
Masticatory muscle thickness, bite force, and occlusal contacts in young children with unilateral posterior crossbite.
difficulty in opening the mouth, difficulty in prehension and bilateral atrophy of masticatory muscles.
Many of the above findings, multifocal neurofibromas in mandible and maxilla and musculoskeletal defects including hypoplasia of the masticatory muscles in the present case, were all revealed by CT and MRI.
Xylitol mints and lozenges could be suggested as they provide both caries benefit and improve salivary flow without stressing masticatory muscles.
spasticity, hyperactive masticatory muscles, malocclusion and emotional stress.
According to the data obtained the structure of the temporomandibular joint and the origo-insertio and the compartmentalization of the masticatory muscles were generally similar to those of other ruminants.
The absence of significant differences in the masseters' sEMG activity observed among patients with different cleft types suggests a symmetric function of the masticatory muscles during mastication despite the presence of alterations.
5) Temporomandibular joint dysfunction (TMD) consists of a series of clinical signs and symptoms involving the temporomandibular joint (TMJ) and/or masticatory muscles, with pain being the most frequent symptom.