EFFECTS OF PRE-MOTION ELECTROMYOGRAPHIC SILENT PERIOD ON DYNAMIC FORCE EXERTION DURING A RAPID BALLISTIC MOVEMENT IN MAN
EFFECTS OF PRE-MOTION ELECTROMYOGRAPHIC SILENT PERIOD ON DYNAMIC FORCE EXERTION DURING A RAPID BALLISTIC MOVEMENT IN MAN
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DOI：
10.1007/bf00643520
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发表时间：
1989-01-01
期刊：
影响因子：
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通讯作者：
YABE, K
中科院分区：
文献类型：
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作者：
AOKI, H;TSUKAHARA, R;YABE, K
在10名健康受试者进行弹道式伸肘时，研究了运动前安静期（PSP）对动态施力的影响。实验旨在评估两组平均动态力曲线之间的平均差异的显著性：PSP存在组和PSP不存在组。PSP的存在进行了定量和自动判断，通过一个新开发的方法，使用统计分析。结果表明，PSP对运动员动态用力有两种作用：一种是减少作用，在运动前观察到;另一种是加强作用，在弹道运动的第一部分观察到。PSP的强化作用持续时间与其还原作用持续时间显著相关。结果提示，PSP发生后，主动肌的预牵张可能导致了动态力的增强。PSP在动力性用力中起重要作用的事实表明，PSP可能被纳入中枢运动控制系统，旨在中断背景活动，伸展激动剂和加强动力。
The effects of pre-motion silent period (PSP) on dynamic force exertion were studied in ten healthy subjects performing ballistic elbow extensions. The experiments were designed to evaluate the significance of mean differences between the averaged dynamic force curves of two groups: PSP-presence groups and PSP-absence groups. The presence of PSP was judged quantitatively and automatically by means of a newly developed method using statistical analysis. The results indicated that there were two effects of PSP on dynamic force exertion: one was a reducing effect, observed prior to the movement; the other was a reinforcing effect, observed in the first part of the ballistic movement. The duration of the reinforcement was significantly correlated with the duration of the reducing effect of PSP. The findings suggested that the reinforcement of dynamic force may be produced by the pre-stretch of agonistic muscles caused by prior force reduction due to PSP occurrence. The fact that PSP plays an important role in dynamic force exertion suggests that PSP may be incorporated in the central motor control system designed to interrupt the background activity, to stretch the agonist and to reinforce the dynamic force.