Environmental experience within and across testing days determines the strength of human visuomotor adaptation.
Environmental experience within and across testing days determines the strength of human visuomotor adaptation.
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测试期间和测试期间的环境经验决定了人类视觉运动适应的强度。
DOI：
10.1007/s00221-011-2945-z
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发表时间：
2012
影响因子：
2
通讯作者：
Thoroughman,KurtA
中科院分区：
文献类型：
--
作者：
Semrau,JenniferA;Daitch,AmyL;Thoroughman,KurtA
视觉的使用使我们能够通过适当地将外部感觉信息转化为适当的运动命令来指导和修改我们的运动。我们研究了人们如何在不同的视觉反馈环境中学习视觉运动转换。这些环境表现出视觉运动方向的扰动。在实验和测试期间，我们改变了视觉扰动发生的可能性以及视觉扰动角度的符号和强度的分布。然后，我们观察了感知误差如何转化为增量适应取决于视觉摄动角度和环境经验。我们发现，环境背景会在一天内和几天内影响适应性反应。这种跨天效应非常深刻，以至于人们对相同的刺激表现出非常弱或非常强的适应敏感性，完全依赖于前几天的经验。我们得出的结论是，对视觉反馈的逐次适应不是固定的，而是依赖于短期和长期尺度上的环境经验。
The use of vision allows us to guide and modify our movements by appropriately transforming external sensory information into proper motor commands. We investigated how people learned visuomotor transformations in different visual feedback environments. These environments presented perturbations of visual sense of movement direction. Across experiments and testing days, we altered the likelihood of visual perturbation occurrence and the distribution of sign and strength of visual perturbation angles. We then observed how transformation of sensed error into incremental adaptation depended on visual perturbation angle and on environmental experience. We found that environmental context affected adaptive responses within a day and across days. The across-day effect was profound enough that people exhibited very weak or very strong adaptive sensitivity to identical stimuli, dependent solely on prior days’ experience. We conclude that trial-by-trial adaptation to visual feedback is not fixed, but dependent on environmental experiences on both short and long time scales.