Levine D N, Calvanio R
Neurology. 1980 Jan;30(1):21-30. doi: 10.1212/wnl.30.1.21.
Visual discrimination was studied in each visual field of a patient with surgical section of the posterior corpus callosum. Light-detection thresholds were increased nearly equally in right and left visual fields, suggesting that normal thresholds require the cooperative activity of both posterior cerebral hemispheres, mediated by the corpus callosum. In contrast, there was superiority in the right visual field in naming, coping, and matching letter, number, and colors, but not unfamiliar shapes. The results are attributed to a differential effect of experience on perception in each visual field. The right-visual-field superiority in learning to perceive arrays on letters, numbers, and colors may result directly from the superiority of the left hemisphere in speech.
对一名接受了胼胝体后部手术切断的患者的每个视野进行了视觉辨别研究。左右视野的光检测阈值几乎同等增加，这表明正常阈值需要由胼胝体介导的两个大脑后半球的协同活动。相比之下，在命名、临摹以及匹配字母、数字和颜色方面，右视野表现更优，但在识别不熟悉形状方面并非如此。研究结果归因于经验对每个视野感知的不同影响。在学习感知字母、数字和颜色排列方面右视野的优势可能直接源于左半球在语言方面的优势。
