Gille H G, Ullsperger P, Pietschmann M
Act Nerv Super (Praha). 1983 Mar;25(1):37-42.
Recent studies have furnished evidence of hemispheric asymmetry in the EEG and event-related potentials in man. Face-validated tasks as verbal and nonverbal ones (A: mental arithmetic; B: detection of a target in the hand of a manikin in different positions) were tachistoscopically presented to check side differences of VEP parameters in 5 healthy right-handed subjects. The EEG was recorded from C3, C4, P3 and P4 referenced to linked ears. The mean peak latencies of averaged VEPs were P1: 107 ms, N1: 142 ms, P2: 203 ms, N2: 265 ms, P3: 357 ms. No consistent treatment effects were obtained for peak latencies. Regardless of side differences, the attention related VEP amplitudes P1-N1 and N1-P2 were higher in A. Rightleft differences were found to be higher for visual-spatial transformation, except P2-N2 amplitude. The asymmetry of amplitudes suggests a higher activity of the right hemisphere in B. A possible description of dynamic variations due to learning and changes of strategy during repetitive mental activity by means of changes in EP asymmetry will be of interest for further investigations.
最近的研究提供了人类脑电图（EEG）和事件相关电位半球不对称性的证据。通过速示器呈现经表面效度验证的言语和非言语任务（A：心算；B：检测处于不同位置的人体模型手中的目标），以检查5名健康右利手受试者视觉诱发电位（VEP）参数的左右差异。EEG记录于以双耳相连为参考的C3、C4、P3和P4电极。平均VEP的平均峰值潜伏期为：P1：107毫秒，N1：142毫秒，P2：203毫秒，N2：265毫秒，P3：357毫秒。未获得峰值潜伏期的一致处理效应。无论左右差异如何，任务A中与注意力相关的VEP波幅P1-N1和N1-P2更高。除P2-N2波幅外，视觉空间转换的左右差异更大。波幅的不对称表明任务B中右半球的活动更高。通过事件相关电位（EP）不对称性的变化来描述重复心理活动期间由于学习和策略改变引起的动态变化，这对于进一步研究将是有意义的。
