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Masticatory movements and jaw reflexes. Toshifumi MORIMOTO 1 1Department of Oral Physiology, Faculty of Dentistry, Osaka University pp.834-844
Published Date 1993/10/10
DOI https://doi.org/10.11477/mf.1431900371
  • Abstract
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While food is chewed in the mouth, the pattern of rhythmic jaw movements varies with the pro-cess of mastication. Rhythmic movements of the jaw are fundamentally programmed in the central nervous system, i.e., the central pattern (or rhythm) generator. During chewing food, however, these movements must be controlled according to physical properties of food such as size, hardness, elasticity, viscosity, and so on. Furthermore, the movement of the tongue also must change in accordance with the change in the jaw movements. Reflexes in the oral-facial region are utilized for the control and integration of the masticatory jaw and tongue movements.

1. Jaw reflexes

Jaw reflexes are classified into two groups according to the direction of the jaw movement: jaw closing reflex and jaw opening reflex. The former is further divided into two types. One is the periodontal-masticatory muscle reflex and the other is the jaw-jerk reflex. Both reflexes contribute to the control of the biting and chewing forces.


Copyright © 1993, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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