10 下顎の開口動作に先行する開口筋筋活動に関する筋電図的研究 (第440回大阪歯科学会例会)

概要

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We attempted to clarify the primary factors determining the timing of initial electromyographic discharges of the jaw depressor muscles (EMG-onset) by examining how to change EMG-onset by varying the duration of the open-close movement or occlusal force using the open-close-clench cycle (OCC). We also considered the effect of tooth contact and mechanoreceptors in the periodontal tissues. On both normal dentate and edentulous subjects, EMG-onset preceded initiation of opening during OCC. In normal subjects, mean masseter muscle activity associated with occlusal force was found to have significant correlation with EMG-onset. However, in open-close movement without tooth contact, EMG-onset tended to delay initiation of opening movement.
大阪歯科学会の論文
1995-04-25