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视觉运动学习围绕预期动作进行泛化。

Visuomotor Learning Generalizes Around the Intended Movement.

作者信息

Day Kevin A, Roemmich Ryan T, Taylor Jordan A, Bastian Amy J

机构信息

Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205; Motion Analysis Laboratory, Kennedy Krieger Institute, Baltimore, Maryland 21205.

Motion Analysis Laboratory, Kennedy Krieger Institute, Baltimore, Maryland 21205; Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.

出版信息

eNeuro. 2016 Apr 29;3(2). doi: 10.1523/ENEURO.0005-16.2016. eCollection 2016 Mar-Apr.

Abstract

Human motor learning is useful if it generalizes beyond the trained task. Here, we introduce a new idea about how human visuomotor learning generalizes. We show that learned reaching movements generalize around where a person intends to move (i.e., aiming direction) as opposed to where they actually move. We used a visual rotation paradigm that allowed us to disentangle whether generalization is centered on where people aim to move, where they actually move, or where visual feedback indicates they moved. Participants reached to a visual target with their arm occluded from view. The cursor feedback was rotated relative to the position of their unseen hand to induce learning. Participants verbally reported their aiming direction, reached, and then were shown the outcome. We periodically introduced single catch trials with no feedback to measure learning. Results showed that learning was maximal at the participants' aiming location, and not at the actual hand position or where the cursor was displayed. This demonstrates that visuomotor learning generalizes around where we intend to move rather than where we actually move, and thus introduces a new role for cognitive processes beyond simply reducing movement error.

摘要

如果人类运动学习能够超越所训练的任务进行泛化,那么它将是有用的。在此,我们引入了一个关于人类视觉运动学习如何泛化的新观点。我们表明,所学的伸手动作是围绕着一个人的意图移动位置(即目标方向)进行泛化的,而不是围绕他们实际移动的位置。我们使用了一种视觉旋转范式,这使我们能够区分泛化是围绕人们的目标移动位置、实际移动位置还是视觉反馈所指示的移动位置。参与者在手臂被遮挡看不见的情况下伸手去够一个视觉目标。光标反馈相对于他们看不见的手的位置进行旋转以诱导学习。参与者口头报告他们的目标方向,伸手去够,然后看到结果。我们定期引入无反馈的单次捕捉试验来测量学习情况。结果表明,学习在参与者的目标位置达到最大值,而不是在实际手部位置或光标显示的位置。这表明视觉运动学习是围绕我们打算移动的位置而不是实际移动的位置进行泛化的,因此引入了认知过程的一个新作用,而不仅仅是简单地减少运动误差。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b9fc/4894913/96d77c81f1c9/enu0021620410001.jpg

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