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利用事件相关电位(ERP)研究上下视野在电生理反应上和注意上的不对称性.实验采用目标检测任务.ERP早期成分的结果显示,与上视野刺激相比,下视野刺激在枕顶区诱发出较小的P1和较大的N1;而ERP晚期成分(N2和P3)则没有表现出上下视野的差异.此外,P1成分的注意增强效应在上视野表现的比在下视野更大.这些结果提示,上下视野的功能差异不仅体现在早期的视觉信息处理上,还体现在对早期视诱发的注意调控上.
The use of event-related potentials (ERP) to study the upper and lower visual field in the electrophysiological response and attention to the asymmetry of the experiment using the target detection tasks.ERP early components of the results show that compared with the upper visual field stimulation, lower visual field stimulation in the pillow area Induced smaller P1 and larger N1, while the late components of ERP (N2 and P3) did not show differences between the upper and lower visual fields.In addition, the attentional enhancement effect of the P1 component was higher in the upper field than in the lower field. The results suggest that the functional differences between the upper and lower field of vision not only reflected in the early visual information processing, but also reflected in the early visual evoked attention control.