Hemispheric differences in the relationship between corticomotor excitability changes following a fine-motor task and motor learning
Hemispheric differences in the relationship between corticomotor excitability changes following a fine-motor task and motor learning
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DOI：
10.1152/jn.00595.2003
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发表时间：
2004-04-01
影响因子：
2.5
通讯作者：
Nordstrom, MA
中科院分区：
文献类型：
--
作者：
Garry, MI;Kamen, G;Nordstrom, MA
运动表现诱导运动后皮质运动兴奋性的增加，这可能与运动学习有关。我们调查是否有半球的差异，在操作任务（普渡钉板）后皮质运动兴奋性的变化的程度和/或时间过程中，它们与运动性能的关系。单脉冲和成对脉冲（3 ms）经颅磁刺激（TMS）被用来评估任务诱导的促进肌肉诱发电位（MEP）和皮质内抑制（ICI）的三个内在的手肌肉作用于数字1，2，和5。15名右撇子受试者在单独的会议中用左手或右手进行了三次30秒的钉板试验。在表演前和表演后，对侧运动皮层应用TMS。在三次试验中，右手放置的钉数量更高，双手的表现（运动学习）也有所改善。MEP促进后的性能是短暂的（
Motor performance induces a postexercise increase in corticomotor excitability that may be associated with motor learning. We investigated whether there are hemispheric differences in the extent and/or time course of changes in corticomotor excitability following a manipulation task (Purdue pegboard) and their relationship with motor performance. Single- and paired-pulse ( 3 ms) transcranial magnetic stimulation (TMS) was used to assess task-induced facilitation of the muscle evoked potential ( MEP) and intracortical inhibition (ICI) for three intrinsic hand muscles acting on digits 1, 2, and 5. Fifteen right-handed subjects performed three 30-s pegboard trials with left or right hand in separate sessions. TMS was applied to contralateral motor cortex before and after performance. Number of pegs placed was higher with the right hand, and performance improved ( motor learning) with both hands over the three trials. MEP facilitation following performance was short-lasting (