Mastication


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Mastication

 

the mechanical processing of food in the oral cavity; consists of grinding and mixing the food with saliva. The process entails the biting off of food and mashing, crushing, and grinding it between the teeth. In animals, including man, mastication is accomplished by vertical, front-to-back, and lateral movements of the lower jaw in relation to the upper jaw, brought about by the contraction of the masticatory muscles. Movements of the tongue and cheeks, which shift the food around the oral cavity, are of auxiliary significance. Considerable pressure is exerted on the teeth during mastication.

Mastication is a complex coordinated action, regulated by a special nerve center in the medulla oblongata and also by the subcortical and cortical sections of the cerebral hemisphere. Damage to the masticatory apparatus, particularly anodontia or tooth disorders, interferes with the normal processing and assimilation of food and may cause disorders in the digestive tract.

References in periodicals archive ?
(1) The activity indices of the mastication muscles were normally distributed across all groups under analysis (the p value of the Shapiro-Wilk test above 0.05), therefore the analysis was performed using the parametric Student f-test.
In terms of functional results, postoperative mastication and swallowing functions were good.
And how are these mastication seminars going to work?
The instrumental settings were adjustable for temperature and mastication rate.
Because chapparal ecosystems are often found near California's urban areas, they are a major focus for fuel reduction efforts such as mastication treatments and controlled burns.
After supplementation, recovery in term of restoration of appetite without any difficulty in mastication, slight reduction in facial swelling were observed in all animals.
Patients with persistent foramen tympanicum can be asymptomatic or can present with complaints of otalgia, otorrhea (during mastication), and soft tissue mass protruding through the EAC.
The food breakdown path demonstrates the progressive reorganization of food structure during mastication, which is linked to individual texture perception, including the degree of structure, degree of lubrication, and chewing time [6, 7].
The three-dimensional analysis of the mandibular movements during mastication improves the understanding of the coordination of these complex functional movements.
Gastric bezoars are found commonly in patients with poor mastication, poor gastric motility, and previous gastric surgery.
Posterolaterally it was extended into infratemporal fossa involving muscles of mastication. Laterally ramus of mandible appeared intact (Figure-1).