Spence C, Kingstone A, Shore D I, Gazzaniga M S
University of Oxford, England.
Psychol Sci. 2001 Jan;12(1):90-3. doi: 10.1111/1467-9280.00316.
Recent neurophysiological research in the monkey has revealed bimodal neuronal cells with both tactile receptive fields on the hand and visual receptive fields that follow the hands as they move, suggesting the existence of a bimodal map of visuotactile space. Using a cross-modal congruency task, we examined the representation of visuotactile space in normal people and in a split-brain patient (J. W.) as the right arm assumed different postures. The results showed that the congruency effects from distracting lights followed the hand around in space in normal people, but failed to do so in the split-brain patient when the hand crossed the midline. This suggests that cross-cortical connections are required to remap visual space to the current hand position when the hand crosses the midline.
近期对猴子的神经生理学研究发现了双模式神经元细胞，其手部具有触觉感受野，视觉感受野则随着手部移动而移动，这表明存在视觉触觉空间的双模式图谱。我们使用跨模式一致性任务，研究了正常人和一名裂脑患者（J.W.）在右臂呈现不同姿势时视觉触觉空间的表征。结果显示，在正常人中，来自干扰光的一致性效应会在空间中跟随手部移动，但在裂脑患者中，当手部越过中线时则不会如此。这表明，当手部越过中线时，需要跨皮质连接来将视觉空间重新映射到当前手部位置。
