Motor adaptation scaled by the difficulty of a secondary cognitive task.
Motor adaptation scaled by the difficulty of a secondary cognitive task.
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DOI：
10.1371/journal.pone.0002485
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发表时间：
2008-06-18
期刊：
影响因子：
3.7
通讯作者：
Thoroughman KA
中科院分区：
文献类型：
--
作者：
Taylor JA;Thoroughman KA
运动学习需要评估先前运动的表现并修改未来的运动。执行系统通常参与计划和决策，可以监控和修改行为，以应对任务难度或表现的变化。在这里，我们的目标是确定认知对反应性和适应性控制的定量贡献，以确定认知过程和运动过程之间可能的重叠。我们开发了一个双任务实验，在参与者执行运动适应任务的同时，改变了次要认知任务的逐个试验难度。受试者进行了一个困难的分级语义分类任务，同时达到偶尔受到力扰动的运动。我们发现，运动适应是特别受损的最困难的分类试验。我们认为，一个特定的分类的决策水平的难度程度不同的负担的执行系统，并随后导致适应成比例的退化。我们的研究结果表明，执行控制在运动适应的具体定量贡献。
Motor learning requires evaluating performance in previous movements and modifying future movements. The executive system, generally involved in planning and decision-making, could monitor and modify behavior in response to changes in task difficulty or performance. Here we aim to identify the quantitative cognitive contribution to responsive and adaptive control to identify possible overlap between cognitive and motor processes. We developed a dual-task experiment that varied the trial-by-trial difficulty of a secondary cognitive task while participants performed a motor adaptation task. Subjects performed a difficulty-graded semantic categorization task while making reaching movements that were occasionally subjected to force perturbations. We find that motor adaptation was specifically impaired on the most difficult to categorize trials. We suggest that the degree of decision-level difficulty of a particular categorization differentially burdens the executive system and subsequently results in a proportional degradation of adaptation. Our results suggest a specific quantitative contribution of executive control in motor adaptation.
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