Buxbaum L J, Coslett H B
Moss Rehabilitation Hospital, Philadelphia, PA 19141.
Neuropsychologia. 1994 Mar;32(3):275-88. doi: 10.1016/0028-3932(94)90131-7.
From a group of 22 patients with neglect, we identified five patients who neglected the left sides of "chimeric" figures composed of the conjoined right and left halves of drawings of two different objects; these subjects reported the left half-drawing significantly more accurately when a gap was introduced between the chimeric halves. The improvement in the "gap" condition cannot be attributed to the subjects' recognition that the right-sided stimuli were incomplete, as when whole figures were presented on the right along with left-sided half figures, the enhancement in reporting accuracy was maintained. For at least one patient, sufficient information was available about the neglected stimuli to support accurate recognition in a forced-choice task with foils visually similar to the targets. On the basis of these and other data, we propose that for these patients with neglect, visual processing systems subserving the registration of discrete object markers in a spatial map are at least relatively intact, but that there is an impairment in the allocation of attention to the left sides of these markers.
在一组22名患有忽视症的患者中，我们识别出5名患者，他们忽视了由两个不同物体的左右两半拼接而成的“嵌合体”图形的左侧；当在嵌合体的两半之间引入间隙时，这些受试者对左半部分图形的报告明显更准确。“间隙”条件下的改善不能归因于受试者认识到右侧刺激不完整，因为当右侧呈现完整图形而左侧呈现半图形时，报告准确性的提高仍然保持。对于至少一名患者，有足够的关于被忽视刺激的信息，以支持在与目标视觉上相似的陪衬物的强制选择任务中进行准确识别。基于这些及其他数据，我们提出，对于这些患有忽视症的患者，服务于在空间地图中登记离散物体标记的视觉处理系统至少相对完整，但在将注意力分配到这些标记的左侧方面存在损伤。
