AMPLITUDE REDUCTION OF H-REFLEX DURING MENTAL MOVEMENT SIMULATION IN ELITE ATHLETES
AMPLITUDE REDUCTION OF H-REFLEX DURING MENTAL MOVEMENT SIMULATION IN ELITE ATHLETES
复制标题
DOI：
10.1016/0166-4328(94)90037-x
复制
发表时间：
1994-05-30
影响因子：
2.7
通讯作者：
MAESHIMA, T
中科院分区：
文献类型：
--
作者：
OISHI, K;KIMURA, M;MAESHIMA, T
为探讨运动想象（motorimagery，MI）心理模拟过程中运动神经元兴奋性的变化，在进行速滑短跑MI时，同时记录比目鱼肌H反射和自主神经效应器的几种活动。研究对象为7名18 ~ 24岁的优秀速滑运动员。他们都精通MI，可以在内心想象出完整生动的滑冰运动，就好像他们真的在锻炼一样。受试者清醒、放松并被蒙上眼睛。首先设置休息（5 min）、正性放松（4 min）和集中（2.5min）时间。然后，在先前宣布开始后，MI是由信号枪的声音启动的，信号枪的声音由录音机记录下来。每名受试者的MI持续约36 s至38 s，这些成像时间非常接近每名受试者的实际个人最佳记录。在所有试验中，以皮肤电传导反应（SCR）、心率（HR）和呼吸率（RSR）为代表的自主效应器在MI期间变得显著活跃。SCR平均提高了51%。与静息期相比，HR和RSR分别增加了57%和76%。自主效应器的这些变化都是显著的，并且是在实际运动中被激活的。心肌梗死前H反射振幅基本不变。然而，H反射振幅的降低在MI开始后立即出现，并持续到MI结束。与休息期相比，抑郁的相对值在16%~ 54%，差异有统计学意义（P
In order to investigate the changes of motoneuron excitability during mental simulation of a voluntary movement (motor imagery; MI), the soleus H-reflex and several activities of autonomic effecters were recorded simultaneously when MI of speed skate sprint was performed. The subjects were seven elite speed skate athletes ranging in age from 18 to 24 years old. They were all skilled in MI, and could imagine full vivid skating movement internally as if they were really exercising. The subjects were awake, relaxed and blindfolded. At first, rest (5 min), positive relaxation (4 min) and concentration periods (2.5 min) were set up. Then, after the previous announcement for the start, MI was initiated by the sound of a signal gun which was recorded by a tape recorder. MIs were continued for each subject from about 36 s to 38 s, and these imaging times were very close to the actual personal best records of each subject. The autonomic effecters represented by skin conductance response (SCR), heart rate (HR), and respiration rate (RSR) became remarkably active during MI in all trials. SCR was increased by 51% on the average. Furthermore, HR and RSR were increased by 57% and 76% respectively, compared with those during resting period. These changes in the autonomic effecters were all significant and were those which were activated in actual movements. The amplitudes of H-reflex were almost all constant before MI initiation. However, the reduction of the H-reflex amplitude arose just after the start and lasted to the end of MI. Relative values of the depressions were from 16% to 54% compared with those in rest period, and these depressions were significant statistically (P