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题名:
When adaptive control fails: Slow recovery of reduced rapid online control during reaching under reversed vision
作者: Shenbing Kuang(匡神兵)1,2,3; Gail, Alexander2,3
文章类型: Article
关键词: Rapid online control ; Visually-guided reaching ; Reversed visual feedback ; Offline adaptation ; Internal model
刊名: VISION RESEARCH
ISSN号: 0042-6989
出版日期: 2015-05-01
卷号: 110, 期号:0, 页码:155-165
收录类别: SCI
英文摘要: Previous studies have shown that short-term exposure to mirror-reversed visual feedback suppresses rapid online control (ROC) of arm movements in response to a sudden target displacement. Here we tested if the reduced ROC under reversed vision can be observed for natural reaches without target perturbations, i.e. without corrective movements that are driven by visual input perturbation. Second, we ask if such ROC reduction generalizes to movement phases without visual feedback of the hand. Subjects were instructed to perform simple reach movements towards a stationary target position either under normal or physically reversed vision of the hand during the late movement phase. We quantified time-resolved ROC via a coefficient of determination of the reach trajectories over the full course of the movement. As for other measures in previous studies, we found that our perturbation-independent ROC was reduced within a few trials after exposure to reversed visual feedback. The reduced ROC was restricted to late movement phases, and was not observed in early movement phases. We further asked if subjects would be able to re-gain ROC with prolonged exposure to the reversed visual input. ROC gradually and incompletely increased over the course of 400 exposure trials, affecting both early and late movement phases. Our results show that under reversed vision ROC is reduced even for perturbation-independent natural reaches aiming at stationary targets. (C) 2014 Elsevier Ltd. All rights reserved.
语种: 英语
WOS记录号: WOS:000355349100003
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.psych.ac.cn/handle/311026/13373
Appears in Collections:脑与认知科学国家重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Psychol, State Key Lab Brain & Cognit Sci, Beijing 100101, Peoples R China
2.German Primate Ctr, Gottingen, Germany
3.Bernstein Ctr Computat Neurosci, Gottingen, Germany

Recommended Citation:
Kuang, Shenbing,Gail, Alexander. When adaptive control fails: Slow recovery of reduced rapid online control during reaching under reversed vision[J]. VISION RESEARCH,2015,110(0):155-165.
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