Prism adaptation with delayed visual error signals in the monkey

被引:0
|
作者
Shigeru Kitazawa
Ping-Bo Yin
机构
[1] National Institute of Advanced Industrial Science and Technology,Neuroscience Research Institute
[2] PRESTO,Laboratory of Neuropsychology
[3] JST,undefined
[4] CREST,undefined
[5] JST,undefined
[6] NIMH,undefined
[7] NIH,undefined
来源
Experimental Brain Research | 2002年 / 144卷
关键词
Prism adaptation; Reaching; Arm movements; Motor learning; Visual delay; Error signals; Monkey;
D O I
暂无
中图分类号
学科分类号
摘要
Errors in reaching produced by displacing the visual field with wedge prisms decrease with trials, even when the error is not revealed until the completion of the movement. To examine how much additional delay in visual feed-back the monkey can compensate for, the effects of delaying the visual error signals were studied by presenting the terminal visual images after one of five delays, ranging from 0 to 500 ms. Adaptation was fastest when the delay was 0 or 10 ms, decreased significantly with a delay as small as 50 ms and approached zero when the delay was 500 ms. The size of the after-effect decreased with the delay accordingly. The results indicate that prism adaptation in the monkey critically depends on the availability of visual information within 50 ms of completion of the movement. Comparing the results with those for humans, we suggest that monkey and human share a mechanism of adaptation with a short time window of 50 ms, but the monkey lacks another mechanism of adaptation that allows a visual delay of 500 ms or more in humans.
引用
收藏
页码:258 / 261
页数:3
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