Intermittency in preplanned elbow movements persists in the absence of visual feedback
Intermittency in preplanned elbow movements persists in the absence of visual feedback
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DOI：
10.1152/jn.1998.80.4.1787
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发表时间：
1998-10-01
影响因子：
2.5
通讯作者：
Hogan, N
中科院分区：
文献类型：
--
作者：
Doeringer, JA;Hogan, N
近100年来，人们一直观察到，视觉引导的人类运动似乎是由分段运动组成的，间歇地执行重叠的部分。本文提出了实验来调查运动间歇的普遍性，特别是，它是否完全是由于视觉反馈。在有和没有视觉反馈的情况下，受试者被要求1)匀速移动，2)在相位平面显示器上画椭圆图形（显示速度与位置），这些图形需要不同频率的循环运动。在这两个任务中，我们发现去除视觉反馈并没有显著改变运动间歇。实验对象无法产生匀速运动。此外，当受试者绘制较慢的相平面椭圆时，他们的移动也不那么顺畅。此外，椭圆相平面图形并不总是按照显示中心所建议的频率绘制。相反，受试者的移动速度比高（快）椭圆显示器显示的要慢，比宽（慢）显示器显示的要快。这些结果表明，It运动间歇性并不完全是由视觉反馈引起的，2)实际上可能是运动行为的基本特征。
It has been observed for nearly 100 years that visually guided human movements appear to be composed of submovements, intermittently executed overlapping segments. This paper presents experiments to investigate the pervasiveness of movement intermittency and, in particular, whether it is exclusively due to visual feedback. With and without visual feedback, human subjects were asked to 1)move with constant velocity and 2) draw elliptical figures on a phase-plane display (showing velocity vs, position) that required cyclic movements at different frequencies. In both tasks, we found that removal of visual feedback did not significantly change movement intermittency. Subjects were unable to generate movements at constant speed. In addition, subjects moved less smoothly when drawing slower phase-plane ellipses. Furthermore, elliptical phase-plane figures were not always drawn at the frequency suggested by the center of the display. Instead, subjects moved more slowly than the tall (fast) ellipse displays suggested, and faster than the wide (slow) displays suggested. These results show that It movement intermittency is not exclusively due to visual feedback and 2)may in fact be a fundamental feature of movement behavior.