ARM TRAJECTORY MODIFICATIONS DURING REACHING TOWARDS VISUAL TARGETS
ARM TRAJECTORY MODIFICATIONS DURING REACHING TOWARDS VISUAL TARGETS
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DOI：
10.1162/jocn.1991.3.3.220
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发表时间：
1991-06-01
影响因子：
3.2
通讯作者：
HENIS, E
中科院分区：
文献类型：
--
作者：
FLASH, T;HENIS, E
在本文中，我们研究的问题是如何针对手臂运动的反应或运动时间期间发生的目标位置的突然变化进行修改。 早期的猴子和人类研究表明，有针对性的手臂运动可以引起快速连续，没有明显的延迟响应目标位移，超过正常的反应时间。 然而，目前尚不清楚这种运动任务是如何执行的。 第一个猜测是，当一个新的视觉刺激出现时，旧的计划被中止，新的计划被构思出来。 然而，在分析人类手臂的运动，我们发现，可以很好地解释了一个不同的运动修改方案的意见。 新计划似乎以矢量方式添加到原始计划中。 这一结果的影响之一是元素运动的平行规划的可能性，并进一步支持手臂运动的想法，即通过外部空间的手部运动在内部表示。
In this paper we study the question of how an aimed arm movement is modified in response to a sudden change in target location occurring during the reaction or movement time. Earlier monkey and human studies demonstrated that aimed arm movements can be elicited in quick succession, without appreciable delays in responding to the target displacement, beyond the normal reaction time. Nevertheless, it is not yet clear how this motor task is performed. A first guess is that when a new visual stimulus appears the old plan is aborted and a new one conceived. Upon analyzing human arm movements, however, we find that the observations can be well accounted for by a different movement modification scheme. It appears that a new plan is vectorially added to the original plan. Among the implications of this result is the possibility of parallel planning of elemental movements and further support for the idea that arm movements are internally represented in terms of hand motion through external space.