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学科主题: 精神卫生
题名:
The effect of short-term training on cardinal and oblique orientation discrimination: An ERP study
作者: Song, Yan1; Sun, Li2; Wang, You3; Zhang, Xuemin1; Kang, Jing1; Ma, Xiaoli1; Yang, Bin1; Guan, Yijie1; Ding, Yulong3
关键词: Event-related potentials (ERPs) ; Vision ; Training ; Specificity ; Generalization ; Grating orientation ; Human adults
刊名: INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY
发表日期: 2010-03-01
DOI: 10.1016/j.ijpsycho.2009.11.007
卷: 75, 期:3, 页:241-248
收录类别: SCI ; SSCI
文章类型: Article
WOS标题词: Social Sciences ; Science & Technology
类目[WOS]: Psychology, Biological ; Neurosciences ; Physiology ; Psychology ; Psychology, Experimental
研究领域[WOS]: Psychology ; Neurosciences & Neurology ; Physiology
关键词[WOS]: PRIMARY VISUAL-CORTEX ; SENSORY THRESHOLDS ; SPECIFICITY ; REPRESENTATION ; DIFFERENCE ; TOPOGRAPHY ; CONTOURS ; STIMULI ; NEURONS ; HUMANS
英文摘要:

The adult brain shows remarkable plasticity, as demonstrated by the improvement in most visual discrimination tasks after intensive practice. However, previous studies have demonstrated that practice improved the discrimination only around oblique orientations, while performance around cardinal orientations (vertical or horizontal orientations) remained stable despite extensive training. The two experiments described here used event-related potentials (ERPs) to investigate the neural substrates underlying different training effects in the two kinds of orientation. Event-related potentials were recorded from subjects when they were trained with a grating orientation discrimination task. Psychophysical threshold measurements were performed before and after the training. For oblique gratings, psychophysical thresholds decreased significantly across training sessions. ERPs showed larger P2 and P3 amplitudes and smaller N1 amplitudes over the parietal/occipital areas with more practice. In line with the psychophysical thresholds, the training effect on the P2 and P3 was specific to stimulus orientation. However, the Ni effect was generalized over differently oriented gratings stimuli. For cardinally oriented gratings, no significant changes were found in the psychophysical thresholds during the training. ERPs still showed similar generalized Ni effect as the oblique gratings. However, the amplitudes of P2 and P3 were unchanged during the whole training. Compared with cardinal orientations, more visual processing stages and later ERP components were involved in the training of oblique orientation discrimination. These results contribute to understanding the neural basis of the asymmetry between cardinal and oblique orientation training effects. (C) 2009 Elsevier B.V. All rights reserved.

语种: 英语
所属项目编号: 30600180 ; 30570605 ; 7073092
项目资助者: National Natural Science Foundation of China ; Beijing Natural Science Foundation ; State Key Laboratory of Cognitive Neuroscience and Learning
WOS记录号: WOS:000276516800004
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/54260
Appears in Collections:北京大学精神卫生研究所_期刊论文

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作者单位: 1.Peking Univ, Inst Mental Hlth, Beijing 100191, Peoples R China
2.Beijing Normal Univ, State Key Lab Cognit Neurosci & Learning, Beijing 100875, Peoples R China
3.Sun Yat Sen Univ, Dept Psychol, Guangzhou 510275, Guangdong, Peoples R China

Recommended Citation:
Song, Yan,Sun, Li,Wang, You,et al. The effect of short-term training on cardinal and oblique orientation discrimination: An ERP study[J]. INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY,2010,75(3):241-248.
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