Harding G F, Grose J, Wilton A, Bissenden J G
Department of Vision Sciences, Aston University, Birmingham, U.K.
Electroencephalogr Clin Neurophysiol. 1989 Jan-Feb;74(1):76-80. doi: 10.1016/0168-5597(89)90053-1.
Visual evoked potentials (VEPs) to pattern reversal stimulation have been obtained in 10 premature babies. The babies were born between 32 and 35 weeks gestational age and had pattern reversal VEPs recorded on at least 2 separate occasions. The responses were obtained from 33 weeks gestational age, and all babies had their initial recording at or before 37 weeks gestational age. The pattern reversal stimulation was produced on a small hand-held television monitor. The black and white checks subtended a visual angle of 2 degrees. Flash VEPs were also recorded on each occasion for comparison. The pattern reversal response consisted of a major positive (P1) component around 280 msec. The latency of the P1 component correlated negatively with gestational age. Although the flash VEP in the same babies was often dominated by the initial negative component no similar negative components were seen in the pattern reversal response.
对10名早产儿进行了图形翻转刺激的视觉诱发电位（VEP）检测。这些婴儿的胎龄在32至35周之间，至少在2个不同时间记录了图形翻转VEP。反应从孕33周开始获得，所有婴儿在孕37周或之前进行了首次记录。图形翻转刺激由一个小型手持电视监视器产生。黑白方格所张视角为2度。每次还记录闪光VEP用于比较。图形翻转反应在约280毫秒处有一个主要的正向（P1）成分。P1成分的潜伏期与胎龄呈负相关。尽管同一婴儿的闪光VEP通常以初始负向成分为主，但在图形翻转反应中未观察到类似的负向成分。
