Asymmetry between the upper and lower visual fields An event-related potential study  

作　　者：QU Zhe SONG Yan DING Yulong 

机构地区：[1]Key Laboratory of Cognitive Science, Graduate School, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100039, China [2]Department of Psychology, Sun Yat-Sen University, Guangzhou510275, China [3]State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, China

出　　处：《Chinese Science Bulletin》2006年第5期536-541,共6页

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.697900800,30200079,30400133&30570605);the Initiative Scientific Research Foundation of Sun Yat-Sen University 100-people Program(Grant No.3253187).

摘　　要：Using event-related potentials (ERPs), the present study examined the electrophysiological and attentional asymmetries between the upper vis- ual field (UVF) and the lower visual field (LVF) while subjects were performing a target detecting task. The early ERP components showed a smaller P1 and a larger N1 in LVF than in UVF over the oc- cipito-parietal areas, while the late components (N2 and P3) showed no difference between the two visual fields. In addition, the attention enhancement on the P1 component was greater in UVF than in LVF. These findings suggest that the function of the UVF and LVF differ in terms of both early visual informa- tion processing and attentional modulation.Using event-related potentials （ERPs）, the present study examined the electrophysiological and attentional asymmetries between the upper visual field （UVF） and the lower visual field （LVF） while subjects were performing a target detecting task. The early ERP components showed a smaller P1 and a larger N1 in LVF than in UVF over the occipito-parietal areas, while the late components （N2 and P3） showed no difference between the two visual fields. In addition, the attention enhancement on the P1 component was greater in UVF than in LVF. These findings suggest that the function of the UVF and LVF differ in terms of both early visual information processing and attentional modulation.

关 键 词：事件相关性电位 电生理学 视觉信息处理 不对称性 上视野 下视野 

分 类 号：Q424[生物学—神经生物学] Q436[生物学—生理学]