Masaki Y
Department of Ophthalmology, Kawasaki Medical School, Kurashiki, Japan.
Nippon Ganka Gakkai Zasshi. 1990 Oct;94(10):964-72.
The dynamic topography of pattern visual evoked potentials (PVEPs) were studied in 20 normal subjects. PVEPs, recorded from 16 electrodes referenced to balanced non-cephalic electrode (BNE), were elicited by a binocular checkerboard pattern (15 min) that alternated at 1 Hz rate on a 14 x 8.5 degree TV monitor 1m distant from the eyes. N70, P100, N100, N150 and P200 components were recorded each time. In 65% of subjects the P100 components appeared in the lateral region in 120-150 msec. In flash VEP, the P100 component did not appear in the lateral region. Recorded on lateral electrodes, N100 components first appeared in the deep frontal region and gradually distributed throughout the frontal region while the P100 component was localized at the occipital pole. In the focused state, the peak latency of the N100 component was the same as that of the P100 component, but in the moderately defocused state, the peak latency of the N100 component was delayed compared with that of the P100 component. This study suggested that the appearance of the P100 component in the lateral region is related to form recognition, and that the N100 component is not the inverse dipole of the P100 component.
对20名正常受试者的图形视觉诱发电位（PVEPs）的动态地形图进行了研究。PVEPs由16个电极记录，参考平衡非头部电极（BNE），通过双眼棋盘格图案（15分钟）诱发，该图案在距离眼睛1米的14×8.5度电视监视器上以1赫兹的频率交替出现。每次记录N70、P100、N100、N150和P200成分。在65%的受试者中，P100成分在120 - 150毫秒出现在外侧区域。在闪光视觉诱发电位中，P100成分未出现在外侧区域。记录在外侧电极上时，N100成分首先出现在额深部区域，并逐渐分布于整个额叶区域，而P100成分则位于枕极。在聚焦状态下，N100成分的峰潜伏期与P100成分相同，但在中度散焦状态下，N100成分的峰潜伏期比P100成分延迟。本研究表明，P100成分在外测区域的出现与形状识别有关，且N100成分不是P100成分的反向偶极。
