视觉注意_____视觉注意；事件相关电位；空间等级

不同范围区域性提示下视觉空间注意的早期ERP研究

http://www.100md.com 《第四军医大学学报》 2005年第3期

视觉注意,,视觉注意；事件相关电位；空间等级,0引言,1对象和方法,2结果,3讨论

     ERP study of visual spatial attention in different spatial scaling cues

    DUAN Qing1, SONG WeiQun2, LUO YueJia1

    1Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China, 2Department of Rehabilitation Medicine, Xuanwu Hospital, Beijing 100053, China

    【Abstract】 AIM: To examine the temporal dynamics of the spatial scaling of attention by using the "cuetarget" visual model and recording eventrelated potentials (ERPs). METHODS: Circles of three sizes were used as cues for attention region. Sixteen college students completed the visual search tasks, and the reaction time (RT) and ERPs were recorded. RESULTS: The main effect of spatial scaling cues on RT was significant: F=7.9, P=0.001. With the increase of the cue scale, RTs increased (669±29) ms → (747±25) ms → (815±23) ms. The amplitudes of the posterior P1 also increased, and the maximum P1 amplitude was found in the biggest cue condition: (1.7±0.4) μV, while the maximum N1 amplitude was found in the smallest cue condition: (-2.8±0.5) μV. CONCLUSION: The results provide electrophysiological evidence that different spatial scaling of attention is related to posterior P1 and N1. ......

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