Saron C D, Davidson R J
University of Wisconsin, Madison 53706.
Behav Neurosci. 1989 Oct;103(5):1115-38. doi: 10.1037//0735-7044.103.5.1115.
Four experiments testing right-handed adult males examined interhemispheric transfer time (IHTT) estimation with visual evoked potentials (EPs) elicited in response to hemiretinal presentations of checkerboard-flash stimuli. Experiment 1 was a study of the relation between reaction time (RT) and EP measures of IHTT. EP measures provided more valid estimates than RT measures because more subjects showed IHTT in the direction of anatomical prediction. Experiment 2 showed that EPs derived from lateral occipital sites provided more valid and longer estimates of IHTT compared with EPs from medial occipital sites. Experiment 3 showed no difference between random versus blocked hemiretinal stimuli. Experiment 4 showed that IHTT derived with a linked-ears reference provided more valid estimates than IHTT derived with a mid-frontal reference and that small changes in stimulus eccentricity did not influence IHTT. The findings of these experiments indicate that noninvasive estimates of visual IHTT can be obtained in humans.
四项针对右利手成年男性的实验，利用对棋盘格闪光刺激半侧视网膜呈现所诱发的视觉诱发电位（EP）来检测半球间传递时间（IHTT）估计。实验1研究了反应时间（RT）与IHTT的EP测量之间的关系。EP测量比RT测量提供了更有效的估计，因为更多受试者的IHTT显示出符合解剖学预测的方向。实验2表明，与来自枕叶内侧部位的EP相比，来自枕叶外侧部位的EP对IHTT的估计更有效且持续时间更长。实验3表明，随机与分块半侧视网膜刺激之间没有差异。实验4表明，与使用额中参考点得出的IHTT相比，使用双耳参考点得出的IHTT提供了更有效的估计，并且刺激偏心率的微小变化不会影响IHTT。这些实验的结果表明，可以在人类中获得视觉IHTT的无创估计。
