Improving human plateaued motor skill with somatic stimulation.
Improving human plateaued motor skill with somatic stimulation.
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DOI：
10.1371/journal.pone.0025670
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Naito E
中科院分区：
文献类型：
--
作者：
Uehara S;Nambu I;Tomatsu S;Lee J;Kakei S;Naito E
程序性运动学习包括一段时间，即使每天重复练习，也无法获得实质性的成绩提高。由于高频经皮电刺激的潜在益处，我们检查了对手部的刺激是否减少了可能存在于后天手部运动技能中的冗余运动活动，以便进一步提升稳定的运动表现。健康的参与者接受训练，直到他们在右手手掌中连续旋转两个球的运动表现变得稳定。在一系列实验中，他们在15秒内尽可能多地重复进行这种循环旋转。在试验中，我们在他们开始任务之前对放松的拇指施加刺激，大多数人报告说，与对照试验相比，他们的动作变得更流畅，并且他们可以以更高的周期执行动作。当腕部的背侧受到刺激时，这是不可能的。性能的改善与手指位移幅度的减少，这是一贯观察到的任务要求无关。重要的是，这种运动学变化发生时没有被参与者注意到，他们故意改变运动策略（减少手指位移的幅度）从未改善表现。此外，在没有刺激的一周训练期间，性能从未自发改善，而在另一周与刺激相结合的训练期间，在几天内始终观察到与刺激相关的改善。在一天的刺激试验中获得的改善效果部分延续到第二天，从而促进了平台性能的日常改善，这不能通过第一周的强化训练来解锁。这项研究证明了有效改善平台运动技能的可能性，以及运动前躯体刺激驱动这种行为变化。
Procedural motor learning includes a period when no substantial gain in performance improvement is obtained even with repeated, daily practice. Prompted by the potential benefit of high-frequency transcutaneous electrical stimulation, we examined if the stimulation to the hand reduces redundant motor activity that likely exists in an acquired hand motor skill, so as to further upgrade stable motor performance. Healthy participants were trained until their motor performance of continuously rotating two balls in the palm of their right hand became stable. In the series of experiments, they repeated a trial performing this cyclic rotation as many times as possible in 15 s. In trials where we applied the stimulation to the relaxed thumb before they initiated the task, most reported that their movements became smoother and they could perform the movements at a higher cycle compared to the control trials. This was not possible when the dorsal side of the wrist was stimulated. The performance improvement was associated with reduction of amplitude of finger displacement, which was consistently observed irrespective of the task demands. Importantly, this kinematic change occurred without being noticed by the participants, and their intentional changes of motor strategies (reducing amplitude of finger displacement) never improved the performance. Moreover, the performance never spontaneously improved during one-week training without stimulation, whereas the improvement in association with stimulation was consistently observed across days during training on another week combined with the stimulation. The improved effect obtained in stimulation trials on one day partially carried over to the next day, thereby promoting daily improvement of plateaued performance, which could not be unlocked by the first-week intensive training. This study demonstrated the possibility of effectively improving a plateaued motor skill, and pre-movement somatic stimulation driving this behavioral change.
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影响因子：
3.3
作者：
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