Halligan P W, Marshall J C
Rivermead Rehabilitation Centre, Oxford, U.K.
Neuropsychologia. 1994 Jan;32(1):13-21. doi: 10.1016/0028-3932(94)90065-5.
We report a case of severe left visuo-spatial neglect consequent upon right-hemisphere stroke. In Experiment 1, we show that while the patient bisects lines significantly to the right of true centre, he is extremely accurate in placing a mark at the centre of an equivalent outlined square. Experiment 2 confirms that the lateral and radial accuracy obtained in the latter (square) task cannot be predicted from the lateral and radial displacements found in horizontal and vertical (radial) line bisection; the experiment also shows that the individual horizontal lines of a square can be bisected significantly more accurately than the same lines presented individually. Experiment 3 shows that the crucial figural component requisite for the accurate estimation of lateral extent is a large vertical (radial) line in right space. The obtained figural modulation of neglect is consistent with the model in which a large, unitary stimulus in right space engages and enhances the lesioned right hemisphere's intrinsic capacity to deploy global attention.
我们报告了一例因右半球中风导致严重左侧视觉空间忽视的病例。在实验1中，我们发现，虽然该患者在平分线段时显著偏向真正中心的右侧，但他在将标记置于等效轮廓正方形中心时却极为准确。实验2证实，无法根据在水平和垂直（径向）线段平分中发现的横向和径向位移来预测在后者（正方形）任务中获得的横向和径向准确性；该实验还表明，正方形的各个水平线被平分的准确性明显高于单独呈现的相同线条。实验3表明，准确估计横向范围所需的关键图形成分是右侧空间中的一条大垂直线（径向线）。所获得的忽视的图形调制与这样一种模型一致，即右侧空间中的一个大的、单一的刺激激活并增强了受损右半球部署全局注意力的内在能力。
