muscles of mastication


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masticatory muscles

[TA]
muscles derived from the first (mandibular) arch used in chewing; all receive innervation from the motor root of the trigeminal nerve via its mandibular division; includes masseter muscle, temporalis muscle, lateral pterygoid muscle, and medial pterygoid muscle.
Synonym(s): musculus masticatorii [TA], muscles of mastication, musculi masticatorii

muscles of mastication

a group of muscles-the masseter, pterygoideus lateralis, pterygoideus medialis, and temporalis-responsible for movement of the jaws during the process of chewing. All four muscles are innervated by the mandibular division of the trigeminal nerve.
References in periodicals archive ?
Ashman's initial evaluation was very thorough, including a comprehensive history, a clinical examination that included range of motions of the cervical area and the mandible, palpation of the muscles of mastication and the cervical muscles, functional movements of the jaw, listening for TMJ and cervical sounds, and additional measurements and tests.
The equilibrium surface tension is high indicating the stability of the saliva film in resting condition when the muscles of mastication are not working and jaw is at rest.
Motor nerves supply the muscles of mastication (temporal and masseter), and the tensors of the soft palate and tympanic membrane.
As defined in the 1996 NIH Technology Assessment Conference Statement, temporomandibular disorders refer to a collection of medical and dental conditions affecting the temporomandibular joint (TMJ) and/or the muscles of mastication (chewing), as well as contiguous tissue components.
The muscles of mastication on the favored side become overdeveloped, and this can lead to symptoms of myofacial pain.
1) Divers also have a tendency to bite harder on one side, intensifying the condition and creating soreness in the muscles of mastication and temporomandibular articulation.
After surgery, light interarch elastics were used to help support the mandible, since the muscles of mastication were reflected from the mandible and were initially nonfunctional.
In addition, there was a marked atrophy of the muscles of mastication and a severe degree of fatty infiltrate on the ipsilateral side (figure).
TMJ describes the physical disorders associated with jaw joints that attach the lower jaw to the temporal bones in the skull as well as disorders and disease associated with the related muscles of mastication, connective tissue and other components of the temporomandibular (jaw) joints.
Spasms of the muscles of mastication can lead to pain, abnormal jaw positioning, temporomandibular joint dysfunction, and trismus.
The masticator space is a facial compartment that contains the muscles of mastication, the mandibular ramus, and various neurovascular structures.