実験的ストレスが顎口腔系機能に及ぼす影響について : 鏡面描写法負荷によるTapping運動の筋電図時間要素の変化
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概要
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An experimental study was undertaken to evaluate the effects of emotional stress to the stomatognathic functions on the mirror drawing test (MDT) which had been employed as a conflict producing situation. The experiments were carried out on ten human subjects having on average age of 26.7 years. None of the subjects had any clinically detectable abnormalities of the masticatory muscles or temporomandibular joints. Each subject performed the mirror drawing test. Then the .MKG and EMGs of tapping movements were recorded nine times during the experiment. The EMGs recorded were from the masseter and anterior temporal muscles. Those were at rest (I) as control, just after the lst MDT (II), just after the 2nd MDT (III) and just after the 3rd MDT (IV), all after a one minute rest interval respectively. Subsequently, the EMGs were recorded five times (V〜IX) each after a two minute rest interval for ten minutes without MDT stress loading. The results were as follows : 1. EMGs time parameters of ASPD (after silent period duration) and BD (burst duration) showed a tendency to be prolonged under stress loading. 2. EMGs time parameters of SPD (silent period duration) tended to decrease under stress loading. 3. The other EMGs time parameters of tapping movement did not show any significant changes. 4. CV (coefficient of variation) values of every EMGs time parameter tended to be higher under stress loading, especially in terms of SPD and ASPD. 5. CV values of the vertical velocity and mandibular opening on MKG tended to be higher under stress loading. MDT stress loading was found to affect EMGs of tapping movement which is regarded tobe a more rhythmical motion compared to other mandibular movements. These results suggest that emotional stress may influence the stomatognathic function.
- 日本補綴歯科学会の論文
- 1988-02-01
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