Weintraub S, Mesulam M M
Division of Neuroscience and Behavioural Neurology, Beth Israel Hospital, Boston, MA 02215.
J Neurol Neurosurg Psychiatry. 1988 Dec;51(12):1481-8. doi: 10.1136/jnnp.51.12.1481.
Patients with unilateral hemispheric lesions were given visual target cancellation tasks. As expected, marked contralateral and less severe ipsilateral visual inattention were observed in patients with right-sided cerebral lesions whereas those with left-sided lesions showed only mild contralateral neglect. Stimulus material (shapes vs letters) and array (random vs structured) interacted in a complex manner to influence target detection only in patients with right-sided lesions. Furthermore, the search strategy of these patients tended to be erratic, particularly when the stimuli were in an unstructured array. A structured array prompted a more systematic and efficient search. It appears, therefore, that stimulus content and spatial array affect neglect behaviour in patients with right-sided lesions and that a lack of systematic visual exploration within the extrapersonal space is one factor that contributes to visual hemispatial inattention.
对单侧半球病变患者进行视觉目标消除任务。正如预期的那样，右侧脑损伤患者出现明显的对侧视觉忽视和不太严重的同侧视觉忽视，而左侧损伤患者仅表现出轻度的对侧忽视。刺激材料（形状与字母）和排列方式（随机与结构化）以复杂的方式相互作用，仅在右侧病变患者中影响目标检测。此外，这些患者的搜索策略往往不稳定，尤其是当刺激处于非结构化排列时。结构化排列促使更系统、高效的搜索。因此，似乎刺激内容和空间排列会影响右侧病变患者的忽视行为，而在个人空间外缺乏系统的视觉探索是导致视觉半空间忽视的一个因素。
