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Analysis of neurophysiological mechanisms in human motor imagery

人类运动想象的神经生理机制分析

基本信息

批准号：
10680031
负责人：
KASAI Tatsuya
金额：
$ 0.96万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10680031/
关键词：
motor imagery motor evoked potential transcranial magnetic stimulation motor learning motor memory motor imagery MEP TMR FDI muscle human step contraction ramp contraction handedaess plasticity 運動誘発電位大脳半球人指し指磁気刺激法

项目摘要

We investigated changes in motor evoked potentials (MEPs) to explain why mental practice can improve motor performance. To examine the present aims, MEPs were recorded from right first dorsal interosseous (FDI) muscle during motor imagery of index finger movement. Main findings were following three points : 1) The primary motor cortex plays a role in the mental representation of motor acts. In particular, the amount of cortico-motoneuronal cell activity is affected by the different motor images utilizing the same muscle. 2) Right-left differences of MEP amplitude support the view of difference between left-handers and right-handers. That is, in case of right-handed subjects, MEP amplitude induced by motor imagery of right (dominant hand) finger movement were significantly larger than those induced by motor imagery of left (non-dominant hand) finger movement. In left-handed individuals, however, these right-left differences in MEP amplitude were not observed. 3) Concerning to training effects on function of motor imagery, the brain function for imaging motor skills differs between highly skilled (Kendo players) and less skilled subjects (normal subjects). These results indicate that motor imagery of highly skilled players involves performing concrete movement imagery (internal motor imagery) whereas that of less skilled players involves motor imagery of looking at the movement (external motor imagery).

我们研究了运动诱发电位（MEP）的变化，以解释为什么心理练习可以提高运动表现。为了研究目前的目标，MEP记录从右第一背侧骨间肌（FDI）在运动想象的食指运动。主要研究结果如下：（1）初级运动皮层在运动行为的心理表征中起重要作用。特别是，皮质运动神经元细胞活性的量受到利用相同肌肉的不同运动图像的影响。2)MEP波幅的左右差异支持左右利手差异的观点。也就是说，在右利手的受试者，MEP幅度引起的右（优势手）手指运动的运动想象显着大于引起的左（非优势手）手指运动的运动想象。然而，在左撇子个体中，没有观察到MEP幅度的左右差异。3)关于运动想象功能的训练效果，高技能（剑道选手）和低技能（正常人）之间的运动技能成像的脑功能不同。这些结果表明，运动想象的高技能的球员涉及执行具体的运动图像（内部运动图像），而不太熟练的球员涉及运动图像看运动（外部运动图像）。