Asymmetric effector transfer of complex movement sequences
Asymmetric effector transfer of complex movement sequences
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DOI：
10.1016/j.humov.2009.08.001
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发表时间：
2010-02-01
影响因子：
2.1
通讯作者：
Shea, Charles H.
中科院分区：
文献类型：
--
作者：
Panzer, Stefan;Krueger, Melanie;Shea, Charles H.
设计了一个实验，以确定添加负载是否改变了使用多元件运动序列的早期实验中观察到的效应器转移曲线。采集任务要求参与者移动水平杠杆（0.567公斤负载）到16个顺序投影的目标。一组用他们的右（优势）肢体练习运动序列，另一组用他们的左（非优势）肢体练习。采集期完成后约24小时，两组均使用其练习和未练习的肢体给予试验块（0 kg、0.567 kg和1.134 kg）。降低和增加载荷对测试性能的影响最小。结果表明，用左肢训练的那组人能够进行右肢测试，而用右肢训练的那组人也能。然而，用右肢训练的那组人用左肢进行测试的速度明显慢于用左肢训练的那组人。重要的是，左侧采集肢体组保持了在各种测试中练习时使用的元素持续时间模式，包括转移到优势肢体。然而，在左肢转移测试中，右采集肢组的元素持续时间的模式被改变，使得仅最快产生的元素的产生被中断。这些结果表明，从右向左转移时序列性能差的原因之一是因为在采集期间开发并用于测试的序列结构缺乏对适当命令的访问，或者控制器缺乏实现有效管理运动动态的代码的能力。(C)2009爱思唯尔有限公司版权所有。
An experiment was designed to determine if the addition of a load altered the effector transfer profile observed in earlier experiments using multi-element movement sequences. The acquisition task required participants to move a horizontal lever (with 0.567 kg load) to 16 sequentially projected targets. One group practiced the movement sequence with their right (dominant) limb and another group practiced with their left (non-dominant) limb. Approximately 24 h after completion of the acquisition session both groups were administered test blocks (0 kg, 0.567 kg, and 1.134 kg) using their practiced and unpracticed limbs. Decreased and increased loads had minimal effect on test performance. The results indicated that the group trained with their left limb were able to perform the right limb tests as well as the group that trained with the right limb. However, the group that trained with their right limb were significantly slower performing the tests with the left limb than the group that practiced with their left limb. Importantly, the left acquisition limb group maintained the pattern of element durations used during practice on the various tests including transfer to the dominant limb. However, the pattern of element durations for the right acquisition limb group on the left limb transfer tests was altered such that the production of only the fastest produced elements were disrupted. These results suggest that one of the reasons for poor sequence performance when transferring from the right to left is because the sequence structure developed during acquisition and used on the tests lacked access to the appropriate commands or the controller lacked the ability to implement codes that effectively manage the movement dynamics. (C) 2009 Elsevier B.V. All rights reserved.