Impaired visual search in patients with unilateral neglect: an oculographic analysis
Impaired visual search in patients with unilateral neglect: an oculographic analysis
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DOI：
10.1016/s0028-3932(97)00058-4
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发表时间：
1997-11-01
期刊：
影响因子：
2.6
通讯作者：
Barton, JJS
中科院分区：
文献类型：
--
作者：
Behrmann, M;Watt, S;Barton, JJS
通过对一组忽视患者的眼动表现的详细分析，研究了偏侧空间忽视的注意缺陷。与正常人和无忽视偏盲患者相比，左侧忽略患者凝视次数较少，对侧检查时间较短。他们也从中线的右侧开始寻找，并在右侧进行明显更多的注视和更长的注视。忽略组整体和大多数个体患者的水平位置和注视频率之间存在正线性关系。这些发现有力地支持了忽视的注意力缺陷遵循左右梯度的观点。然而，最大凝视的峰值并不在最右侧，这可能是严格的梯度计算所预测的，而且与最近的观点更一致，即观察者的中矢状面被重新定向到右侧。这些发现为忽视患者的眼球运动模式提供了详细的分析，并证明了眼科分析在检查他们改变的空间表征方面的稳健性。(C)1997年爱思唯尔科学有限公司。
The attentional deficit underlying hemispatial neglect was examined through a detailed analysis of the eye movement performance of a group of neglect patients. Relative to normal subjects and to patients with hemianopia without neglect, patients with left neglect make fewer fixations and have shorter inspection time on the contralesional left side. They also start their search to the right of the midline and make significantly more fixations and longer fixations on the ipsilesional right side. A positive linear relationship between horizontal location and frequency of fixations was noted for the neglect group as a whole, as well as for most of the individual patients. These findings strongly endorse the view that the attentional deficit in neglect follows a left-right gradient. The peak of the maximum fixations, however, is not on the extreme right, as might be predicted by a strict gradient account, and is more consistent with recent views that the midsagittal plane of the viewer is redirected rightwards. These findings provide a detailed analysis of the eye movement patterns in neglect patients and demonstrate the robustness of oculographic analysis for examining their altered spatial representation. (C) 1997 Elsevier Science Ltd.