Lines C R, Rugg M D, Milner A D
Exp Brain Res. 1984;57(1):89-98. doi: 10.1007/BF00231135.
Visual evoked potentials (VEPs) to bright or dim lateralised light flashes were recorded from homologous occipital and central sites. In a GO/NOGO reaction time task (Experiment 1) the latency of the N160 component of the VEP was found to be shorter from the contralateral hemisphere by approximately 16 ms at occipital sites, but only 3 ms centrally. In addition, there was a trend for the occipital contralateral latency advantage to increase with decreasing stimulus brightness. In Experiment 2 a wider intensity range and a simple visual reaction time task were employed. Contralateral N160 latency advantages were again found to be larger occipitally (approx 13 ms) than centrally (3 ms). Furthermore the occipital contralateral latency advantage was significantly increased at the lower stimulus intensity, while that from central sites remained constant. These data suggest that two types of interhemispheric relay can be distinguished-a sensory one recorded occipitally and a non-sensory one recorded from central sites.
从枕叶和中央的同源部位记录对明亮或昏暗的单侧光闪烁的视觉诱发电位（VEP）。在一个GO/NOGO反应时任务（实验1）中，发现VEP的N160成分在枕叶部位，来自对侧半球的潜伏期比同侧大约短16毫秒，但在中央部位仅短3毫秒。此外，枕叶对侧潜伏期优势有随着刺激亮度降低而增加的趋势。在实验2中，采用了更宽的强度范围和一个简单的视觉反应时任务。再次发现，对侧N160潜伏期优势在枕叶部位（约13毫秒）比对中央部位（3毫秒）更大。此外，在较低刺激强度下，枕叶对侧潜伏期优势显著增加，而中央部位的潜伏期优势保持不变。这些数据表明，可以区分两种类型的半球间中继——一种是在枕叶记录到的感觉性中继，另一种是在中央部位记录到的非感觉性中继。
