Adaptation to direction-dependent visuo-motor rotations and its decay in younger and older adults
Adaptation to direction-dependent visuo-motor rotations and its decay in younger and older adults
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DOI：
10.1016/j.actpsy.2007.07.006
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发表时间：
2008-02-01
影响因子：
1.8
通讯作者：
Hegele, Mathias
中科院分区：
文献类型：
--
作者：
Heuer, Herbert;Hegele, Mathias
我们研究了工作年龄早和晚的成年人对方向相关的视觉运动旋转的适应。对于右手运动，监视器上光标的视觉运动是顺时针旋转，对于向前运动，光标运动的旋转是零，对于中间方向，旋转是中等的。与之前的研究相比，我们没有发现与年龄相关的适应缺陷。在这些研究中，适应更困难(更大的视觉运动旋转，练习中的目标更多)，并且年龄较大的年龄组的适应能力更高。然而，与以前的研究一致，我们发现了与年龄相关的视觉运动旋转显性知识的损害，并且没有与年龄相关的后遗症差异。在24小时不执行任务和长时间执行任务而没有视觉反馈的情况下，我们观察到适应性的衰退，这与年龄无关。目前的研究结果对年龄相关适应障碍的普遍解释提出了质疑，因为在没有与年龄相关的后遗症变化的情况下，有意识的策略性纠正导致的后遗症在较高年龄时变得不那么有效。(C)2007 Elsevier B.V.保留所有权利。
We studied adaptation to a direction-dependent visuo-motor rotation in adults of early and late working age. For hand movements to the right, visual motion of the cursor on a monitor was rotated clockwise, for forward movements rotation of the cursor motion was zero, and for directions in-between rotation was intermediate. In contrast to previous studies, in which adaptation was more difficult (larger visuo-motor rotation, larger number of targets during practice) and the older age group was of higher age, we found no age-related deficit of adaptation. However, consistent with previous studies we found an age-related impairment of explicit knowledge of the visuo-motor rotation and no age-related differences of aftereffects. Across periods of not performing the task for 24 h and of performing the task for a prolonged period of time without visual feedback, we observed a decay of adaptation which did not depend on age. The present findings cast doubts on the prevalent interpretation of age-related impairments of adaptation in the absence of age-related changes of aftereffects as resulting from intentional strategic corrections, which become less efficient at higher age. (c) 2007 Elsevier B.V. All rights reserved.