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首页> 外文期刊>Brain research >Cortical adaptations and motor performance improvements associated with short-term bimanual training.
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Cortical adaptations and motor performance improvements associated with short-term bimanual training.

机译：与短期双手训练有关的皮质适应和运动功能改善。

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Bimanual movement can increase activity within the stroke-affected hemisphere and may contribute to recovery in some patients. To understand how bimanual learning may aid recovery post-stroke, the present study used EEG to investigate cortical adaptations associated with short-term bimanual training and the behavioral modulations that transfer to unimanual movement in healthy individuals. Movement-related potentials (MRP) and reaction times (RT) were recorded from 10 healthy subjects during blocks of unimanual visuomotor trials before and after a bimanual training task. We hypothesized that short-term bimanual practice would induce adaptive cortical changes evident in the MRPs to movements involving a single hand. Post-training results showed that: (1) the late MRP amplitude did not change, (2) RT significantly decreased, and (3) there was a trend for the early MRP amplitude to increase. There was a strong relationship between modulation of early MRP amplitude and RT in the unimanual movement blocks before and after training. Specifically, a subgroup showed a significant decrease in RT in conjunction with a significant increase in the early MRP amplitude. Lastly, comparing later to earlier trials within the bimanual training block, task accuracy and early MRP amplitude significantly increased and (2) a positive re-afferent potential significantly decreased. Results suggest that short-term bimanual training is associated with possible transfer effects to a unimanual task reflected in changes of MRP components and RT. Furthermore, results from the bimanual training trial itself indicate that short-term bimanual training can change the level of motor preparation and sensory feedback in all subjects.
机译：双手运动可增加受中风影响的半球内的活动，并可能有助于某些患者的康复。为了了解双手学习如何帮助中风后恢复，本研究使用脑电图研究了与短期双手训练相关的皮层适应以及健康个体中转移至单手运动的行为调节。在进行一次双向训练任务之前和之后的单手视觉运动试验期间，从10名健康受试者中记录了运动相关电位（MRP）和反应时间（RT）。我们假设，短期的双手练习会引起适应性皮层变化，这种变化在MRP中明显表现为涉及一只手的运动。训练后的结果表明：（1）晚期MRP幅度没有变化，（2）RT显着降低，（3）早期MRP幅度有增加的趋势。训练前后，单手运动块中早期MRP振幅的调制与RT之间存在很强的关系。具体而言，一个亚组显示出RT的显着降低以及早期MRP振幅的显着提高。最后，与后来的双手训练块中的试验相比，任务准确性和早期MRP幅度显着增加，并且（2）积极的重新装备潜力显着降低。结果表明，短期双向培训与可能反映到MRP组件和RT变化的单项任务的转移效果相关。此外，双手训练试验的结果表明，短期双手训练可以改变所有受试者的运动准备和感觉反馈水平。

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