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Distinct Aging Effects on Motion Repulsion and Surround Suppression in Humans
Deng, Hu1,2; Chen, Weiying1,2; Kuang, Shenbing1,2; Zhang, Tao1,2
2017-11-07
发表期刊FRONTIERS IN AGING NEUROSCIENCE
ISSN1663-4365
文章类型Article
卷号9期号:0页码:1-8
摘要

Elderly exhibit accumulating deficits in visual motion perception, which is critical for humans to interact with their environment. Previous studies have suggested that aging generally reduces neuronal inhibition in the visual system. Here, we investigated how aging affects the local intra-cortical inhibition using a motion direction discrimination task based on the motion repulsion phenomenon. Motion repulsion refers to the phenomenon by which observers overestimate the perceived angle when two superimposed dot patterns are moving at an acute angle. The misperception has been interpreted as local mutual inhibition between nearby direction-tuned neurons within the same cortical area. We found that elderly exhibited much stronger motion repulsion than young adults. We then compared this effect to how aging affects the global inter-cortical inhibition by adopting the surround suppression paradigm previously used by Betts et al. (2005). We found that elderly showed less change in the discrimination threshold when the size of a high-contrast drifting Gabor was increased, indicating reduced surround suppression compared to young adults. Our results indicate that aging may not always lead to a decrease of neuronal inhibition in the visual system. These distinct effects of aging on inhibitory functions might be one of the reasons that elderly people often exhibit deficits of motion perception in a real-world situation.

关键词Aging Motion Repulsion Surround Suppression Local Mutual Inhibition Global Inter-areal Inhibition
DOI10.3389/fnagi.2017.00363
收录类别SCI ; SSCI
语种英语
项目资助者National Natural Science Foundation of China(31600845 ; Open Research Fund of the State Key Laboratory of Cognitive Neuroscience and Learning(CNLZD1305) ; 31070960 ; 31271175)
WOS研究方向Geriatrics & Gerontology ; Neurosciences & Neurology
WOS类目Geriatrics & Gerontology ; Neurosciences
WOS记录号WOS:000414533300001
WOS标题词Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]CLASSICAL RECEPTIVE-FIELD ; VISUAL-MOTION ; DIRECTION REPULSION ; MOVING ELEMENTS ; RHESUS-MONKEYS ; PERCEPTION ; DISCRIMINATION ; INHIBITION ; FEEDBACK ; NEURONS
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.psych.ac.cn/handle/311026/22020
专题脑与认知科学国家重点实验室
作者单位1.Chinese Acad Sci, State Key Lab Brain & Cognit Sci, Inst Psychol, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Dept Psychol, Beijing, Peoples R China
推荐引用方式
GB/T 7714
Deng, Hu,Chen, Weiying,Kuang, Shenbing,et al. Distinct Aging Effects on Motion Repulsion and Surround Suppression in Humans[J]. FRONTIERS IN AGING NEUROSCIENCE,2017,9(0):1-8.
APA Deng, Hu,Chen, Weiying,Kuang, Shenbing,&Zhang, Tao.(2017).Distinct Aging Effects on Motion Repulsion and Surround Suppression in Humans.FRONTIERS IN AGING NEUROSCIENCE,9(0),1-8.
MLA Deng, Hu,et al."Distinct Aging Effects on Motion Repulsion and Surround Suppression in Humans".FRONTIERS IN AGING NEUROSCIENCE 9.0(2017):1-8.
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