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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
Source PublicationFRONTIERS IN AGING NEUROSCIENCE
ISSN1663-4365
SubtypeArticle
Volume9Issue:0Pages:1-8
Abstract

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.

KeywordAging Motion Repulsion Surround Suppression Local Mutual Inhibition Global Inter-areal Inhibition
DOI10.3389/fnagi.2017.00363
Indexed BySCI ; SSCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(31600845 ; Open Research Fund of the State Key Laboratory of Cognitive Neuroscience and Learning(CNLZD1305) ; 31070960 ; 31271175)
WOS Research AreaGeriatrics & Gerontology ; Neurosciences & Neurology
WOS SubjectGeriatrics & Gerontology ; Neurosciences
WOS IDWOS:000414533300001
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS KeywordCLASSICAL RECEPTIVE-FIELD ; VISUAL-MOTION ; DIRECTION REPULSION ; MOVING ELEMENTS ; RHESUS-MONKEYS ; PERCEPTION ; DISCRIMINATION ; INHIBITION ; FEEDBACK ; NEURONS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.psych.ac.cn/handle/311026/22020
Collection脑与认知科学国家重点实验室
Affiliation1.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
Recommended Citation
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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