Sinnett Scott, Juncadella Montserrat, Rafal Robert, Azañón Elena, Soto-Faraco Salvador
Parc Científic de Barcelona, Universitat de Barcelona, Spain.
Neuropsychologia. 2007 Feb 1;45(3):552-60. doi: 10.1016/j.neuropsychologia.2006.03.006. Epub 2006 May 9.
Patients with right hemisphere brain lesions often suffer from deficits in spatial attention that can be manifested in different sensory modalities. It has recently been claimed that a relationship (i.e., association) could exist between symptoms of hemi-inattention in different modalities, based on correlations between the results of visual and auditory clinical tests of neglect or extinction. However, it should be noted that the visual and auditory tasks varied greatly both in response type and level of sensitivity. Here, we have examined cross-modal associations in spatial attention deficits using a temporal order judgment task (TOJ) in which patients were required to identify which of two visual or auditory objects had appeared first. When compared to age and education matched control participants, the patients needed, on average, the contralesional stimulus to lead the ipsilesional stimulus to achieve the point of subjective simultaneity (PSS). No association between the degree of visual and auditory hemi-inattention was observed amongst the patients, suggesting that there is a certain degree of independence between the mechanisms subserving spatial attention across sensory modalities.
右半球脑损伤患者常常存在空间注意力缺陷，这些缺陷可在不同的感觉模态中表现出来。最近有人声称，基于忽视或消退的视觉和听觉临床测试结果之间的相关性，不同模态的半侧注意力不集中症状之间可能存在某种关系（即关联）。然而，应当注意的是，视觉和听觉任务在反应类型和敏感度水平上差异很大。在此，我们使用时间顺序判断任务（TOJ）研究了空间注意力缺陷中的跨模态关联，在该任务中，要求患者识别两个视觉或听觉对象中哪个先出现。与年龄和教育程度相匹配的对照参与者相比，患者平均需要对侧刺激领先同侧刺激才能达到主观同时性点（PSS）。在患者中未观察到视觉和听觉半侧注意力不集中程度之间的关联，这表明在跨感觉模态维持空间注意力的机制之间存在一定程度的独立性。
