Learning a visuomotor rotation: simultaneous visual and proprioceptive information is crucial for visuomotor remapping.
Learning a visuomotor rotation: simultaneous visual and proprioceptive information is crucial for visuomotor remapping.
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DOI：
10.1007/s00221-010-2209-3
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发表时间：
2010-05
影响因子：
2
通讯作者：
Sainburg, Robert L.
中科院分区：
文献类型：
--
作者：
Shabbott, Britne A.;Sainburg, Robert L.
视觉运动适应是由预期臂位和感觉臂位之间的误差介导的。然而，目前尚不清楚的是，在运动过程中显示的基于视觉的错误是否会导致与运动后显示的错误在质量上不同或更有效的适应。例如，连续的视觉反馈介导在线错误纠正，这可能促进或抑制适应过程。我们通过在视觉运动适应任务中操纵视觉错误信息和任务指令的时间来解决这个问题。受试者进行视觉运动旋转，在此过程中，他们收到手的位置的连续视觉反馈（CF），并附有纠正或不纠正在线错误的指示，或在每次试验结束时作为静态手路径提供的结果知识（KR）。我们的研究结果表明，所有小组都通过练习提高了表现，并且在线错误纠正对适应过程无关紧要。然而，与CF组相比，KR组在实践中显示出相对较小的平均误差降低，在旋转暴露期间增加了试验间变异性，并且在目标距离和工作空间上的泛化更有限。此外，虽然KR组在练习中表现出提高的表现，但当旋转被移除时，后遗症很小。这些发现表明，虽然延迟的错误信息可能引发补偿策略来抵消扰动，但同时的视觉和本体感觉信息在改变视觉运动图的神经表征方面是至关重要的。
Visuomotor adaptation is mediated by errors between intended and sensory-detected arm positions. However, it is not clear whether visual-based errors that are shown during the course of motion lead to qualitatively different or more efficient adaptation than errors shown after movement. For instance, continuous visual feedback mediates online error corrections, which may facilitate or inhibit the adaptation process. We addressed this question by manipulating the timing of visual error information and task instructions during a visuomotor adaptation task. Subjects were exposed to a visuomotor rotation, during which they received continuous visual feedback (CF) of hand position with instructions to correct or not correct online errors, or knowledge-of-results (KR), provided as a static hand-path at the end of each trial. Our results showed that all groups improved performance with practice, and that online error corrections were inconsequential to the adaptation process. However, in contrast to the CF groups, the KR group showed relatively small reductions in mean error with practice, increased inter-trial variability during rotation exposure, and more limited generalization across target distances and workspace. Further, although the KR group showed improved performance with practice, after-effects were minimal when the rotation was removed. These findings suggest that simultaneous visual and proprioceptive information is critical in altering neural representations of visuomotor maps, although delayed error information may elicit compensatory strategies to offset perturbations.
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影响因子：
3.7
作者：
Heuer, Herbert;Hegele, Mathias
通讯作者：
Hegele, Mathias
DOI：
10.1037/0096-1523.20.5.987
发表时间：
1994-10-01
影响因子：
2.1
作者：
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影响因子：
2
作者：
Cohen, R. G.;Sternad, D.
通讯作者：
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2
作者：
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通讯作者：
Sainburg, RL
影响因子：
2.9
作者：
Ghilardi, MF;Ghez, C;Eidelberg, D
通讯作者：
Eidelberg, D