そしゃく運動における経路と筋活動の相関関係について

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  • An Evalution of Relationship between Chewing Cycle and Mastication Muscle Activities.

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The present study was to determine the fluctuation patterns in the path and activity of masticatory muscle during chewing masticatory movements in three groups of subjects having different degrees of persistent lateralized mastication (expressed as a lateralized mastication index): group I (mild), group II (intermediate), group III (severe).<BR>With regard to the standard deviation of each parameter, N-HM mastication showed a greater variance than HM mastication in all three groups.<BR>The difference between the sides of mastication was the smallest in group I and the largest in group II.<BR>Furthermore, the number of subjects showing such a relationship was the smallest for most parameters in group I and the largest in group III. Subsequently, the interdependent relationship of the course and masticatory activity was examined by the first canonical correlation coefficient of canonical correlation analysis. In HM mastication, all three groups showed practically equal correlation coefficients of 0.87-0.88.<BR>In addition, the subjects in group I showed little or no difference between the two chewing sides, while groups II and III showed a decrease in correlation in N-HM mastication.

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