Masticatory Muscles

(redirected from muscles of mastication)
Also found in: Medical.

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 ?
Temporomandibular disorders (TMD) are a heterogeneous group of symptoms afflicting the temporomandibular joint (TMJ) and/or the muscles of mastication as well as the surrounding tissues.
6] The concept of the structural position (SP) of the mandible was introduced by Moller [7] to characterize the position that provides an optimal functional condition for the muscles of mastication and the TMJ.
The masticator space (MS) contains muscles of mastication (medial and lateral pterygoid, masseter, and temporalis), ramus of the mandible and the third division of the cranial nerve V (Figure 10A).
It also supplies the motor control for the muscles of mastication so Dusty requires both sensory and motor testing.
Masticatory muscle myositis is an autoimmune canine myopathy causing focal inflammation of muscles of mastication including the temporalis, masseter, pterygoid and rostral digastricus, all of which are innervated by mandibular branch of trigeminal nerve (Bolfa et al.
Posterolaterally it was extended into infratemporal fossa involving muscles of mastication.
We report the first case of primary intracranial GS with diffuse, multicompartment invasion of the surrounding skull base, brain parenchyma, orbit, and muscles of mastication, alongside a review of the relevant literature.
Temporomandibular disorders (TMD) are a broad group of problems that affect the temporomandibular joint (TMJ), muscles of mastication, and/or associated bony and soft tissue structures.
Oral Submucosal Fibrosis: Oral Sub-Mucous Fibrosis (OSMF) is a chronic disease of insidious onset featuring the deposition of fibrosis tissues in the sub-mucosal layer of the pharynx, palate, fauces, cheek, lips, pharynx and esophagus, underlying muscles of mastication are also affected (Mokal et al.
Temporomandibular disorders (TMD) are a class of disorders affecting the muscles of mastication and/or the temporomandibular joint (TMJ).
When this occurs to muscles of mastication, the singer will not be able to open her jaw very wide.
Many cerebral palsy patients have poorly innervated muscles of mastication, and perioral muscula- ture.