Spence C, Shore D I, Gazzaniga M S, Soto-Faraco S, Kingstone A
Department of Experimental Psychology, South Parks Road, Oxford, OX1 3UD, UK.
Can J Exp Psychol. 2001 Jun;55(2):133-40. doi: 10.1037/h0087360.
We examined the effect of posture change on the representation of visuotactile space in a split-brain patient using a cross-modal congruency task. Split-brain patient J.W. made speeded elevation discrimination responses (up versus down) to a series of tactile targets presented to the index finger or thumb of his right hand. We report congruency effects elicited by irrelevant visual distractors placed either close to, or far from, the stimulated hand. These cross-modal congruency effects followed the right hand as it moved within the right hemispace, but failed to do so when the hand crossed the midline into left hemispace. These results support recent claims that interhemispheric connections are required to maintain an accurate representation of visuotactile space.
我们使用跨模态一致性任务，研究了姿势变化对一名裂脑患者视觉触觉空间表征的影响。裂脑患者J.W. 对呈现于其右手食指或拇指上的一系列触觉目标，做出快速的高低辨别反应（向上与向下）。我们报告了由放置在靠近或远离受刺激手的无关视觉干扰物引发的一致性效应。当右手在右半空间内移动时，这些跨模态一致性效应会随之出现，但当手越过中线进入左半空间时则不会。这些结果支持了最近的说法，即半球间连接是维持视觉触觉空间准确表征所必需的。
