不同颜色单色光产生的稳态视觉诱发电位的比较  

Comparison of Steady-state Visually Evoked Potential Evoked by Different Monochromatic Light

作　　者：吴正华[1] 尧德中[1] 

机构地区：[1]电子科技大学生命科学与技术学院,成都610054

出　　处：《生物医学工程学杂志》2008年第5期1021-1024,共4页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(30525030)

摘　　要：人的视网膜上的视锥细胞是明视条件下视觉形成的感应器,可分为红锥细胞、绿锥细胞、蓝锥细胞。每类锥细胞有不同的光谱吸收特性。用10Hz的脉冲分别驱动红、绿、蓝三种发光二极管,使其产生同样强度的单色光,用这些单色光分别对10个受试者的双眼进行刺激,用128道的脑电系统对受试者的脑电进行记录。通过对所有电极处的稳态视觉诱发电位(Steady-state visually evoked potential,SSVEP)进行频谱分析,发现不同类视锥细胞输出的信号在视觉初级皮质激发的神经网络分布基本一致,但在各自网络引起的反应强度有差别:蓝光最强,红光次之,绿光最弱。The cone cell on the retina of human is the sensor of vision under illumination; it can be classified into three types： red cone cell, green cone cell, and blue cone cell. There is different property of absorbing light for each type of cone cell. In this work, a 10 Hz pulse was used to drive red, green and blue light emitting diodes respectively, and the different monochromatic light with the same luminance was obtained. The eyes of ten subjects were stimulated by different monochromatic light independently; an EGI system with 128 charmels was used to record the steady-state visually evoked potential （SSVEP）. After applying the fast fourier transform（FFT） to the SSVEP data, we found that the distribution of the neural network in the initial vision cortex activated by the output of the different-typed cone cell remained mainly identical, but there was some difference in intensity between the three types of network： the activity by blue light is the strongest one, that by red light is in the middle, and that by green light is the weakest one.

关 键 词：稳态视觉诱发电位 基频信号 二次谐波 能量 

分 类 号：R318[医药卫生—生物医学工程]