Walter C B
Department of Physical Education, University of Illinois, Chicago 60680.
Percept Mot Skills. 1989 Dec;69(3 Pt 1):819-26. doi: 10.1177/00315125890693-119.
The ability to gain voluntary control over agonist premotor silence through electromyographic (EMG) feedback was examined in healthy subjects performing maximal horizontal elbow flexions. Subjects exhibiting premotor silence on at least 50% of the pretest trials showed significantly greater peak angular velocity than subjects who produced the silent period on fewer than 20% of the trials during the pretest. The latter subjects acquired control of agonist premotor silence with practice and graphic feedback regarding their EMG patterns. The subjects who were the most successful in learning to produce the silent period increased their angular velocity to the level of the subjects who naturally exhibited the inhibition. The less successful subjects showed smaller increases in velocity. The data provide further evidence that premotor silence is primarily under central influence, that its control can be acquired, and that it may be functionally related to contractile rate.
在进行最大水平屈肘动作的健康受试者中，研究了通过肌电图（EMG）反馈获得对主动肌运动前静息的自主控制能力。在至少50%的预测试验中表现出运动前静息的受试者，其峰值角速度显著高于在预测试验中少于20%的试验产生静息期的受试者。后一组受试者通过练习和关于其肌电图模式的图形反馈获得了对主动肌运动前静息的控制。在学习产生静息期方面最成功的受试者将其角速度提高到了自然表现出抑制作用的受试者的水平。不太成功的受试者角速度增加较小。这些数据进一步证明，运动前静息主要受中枢影响，可以获得对它的控制，并且它可能在功能上与收缩率相关。
