颜色差异的VEP时空分布研究  

Spatio-temporal Distribution of Chromatic VEPs

作　　者：刘丹[1] 李颖洁[1] 朱贻盛[2] 赵仑[3,4] 

机构地区：[1]上海大学通信与信息工程学院生物医学工程研究所,上海200072 [2]上海交通大学生命科学技术学院生物医学工程系,上海200240 [3]江苏省语言科学与神经认知工程重点实验室,南京210028 [4]以色列耶路撒冷希伯来大学心理学系

出　　处：《生物医学工程学杂志》2009年第2期253-257,共5页Journal of Biomedical Engineering

基　　金：国家“973计划”项目资助(2005CB724303);上海市重点学科设项目资助(T0102)

摘　　要：不同的颜色诱发的VEP在人脑皮层上具有不同的分布特性。我们通过让被试对象注视含有不同颜色的梯度条图像的实验,着重研究了颜色诱发出的VEP的时空分布特征,比较了不同颜色VEP在特定脑皮层不同区域上分布有何特异性。研究发现当刺激为不同颜色时,三种颜色VEP的P1波和N1波的潜伏期和波幅特征具有显著差异(P<0.001)。大脑皮层对红色的感知速度与强度要高于黑色。而在大脑皮层不同区域位置,颜色VEPP1波和N1波的潜伏期和波幅特征具有显著差异(P<0.001)。枕颞区的反应强度强于其他区域,额区、顶区的VEP潜伏期短于枕颞区。The VEPs evoked by different colors are differently distributed on human cerebral cortex. This study sought to shed light on the spatio-temporal distribution of chromatic VEPs and compare the distribution characteristics of chromatic VEPs evoked by different colors in different cerebral cortex regions. The subjects were asked to stare at the red, green, black gradient bars against a white background. The results show that the latency periods and the amplitudes of P1 and N1 peaks from different chromatic VEPs exhibit significant differences （P〈0. 001）. The speed and intensity of cognitive task of red are higher than those of green. The latency periods and the amplitudes of P1 and N1 peaks from different cerebral cortex regions also display remarkable differences （P〈0. 001）. The intensity of reaction in the temporal and occipital regions is stronger than that in other regions, and the latency periods in frontal area and central area are shorter than those in temporal and occipital regions.

关 键 词：视觉诱发电位 颜色差异 时空分布 

分 类 号：R318.04[医药卫生—生物医学工程]