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Abstract：
Word-centred neglect dyslexia is generally thought to be caused by a visuospatial neglect-like attentional deficit which impacts orientation-canonical representations of visual stimuli. However, the relationship between word-centred neglect dyslexia and more general attentional processes is not well described. Here, we investigated the impact of attentional load manipulations within a case of word-centred neglect dyslexia. This study presents data from a single case, Patient CD, who exhibited ipsilesional word-centred neglect dyslexia in conjunction with severe, contralesional allocentric neglect. CD demonstrated an intact ability to name all letters in visually presented words, but committed neglect dyslexia errors when subsequently asked to read the same word as a whole. The severity of patient CD\'s neglect dyslexia was not found to be impacted by attentional manipulations. We found no effect of exposure time or visual crowding on the frequency of neglect dyslexia errors. This absence of an apparent, right-lateralised perceptual deficit, comorbid left-lateralised object-centred neglect, and insensitivity to attentional load manipulations suggests that the deficit underlying word-centred neglect dyslexia is not related to broad visuo-spatial attention. These findings suggest that neglect dyslexia and domain-general visuospatial neglect may not be as related as previously asserted.
摘要：
以单词为中心的忽视阅读障碍通常被认为是由视觉空间上的忽视状注意力缺陷引起的，这会影响视觉刺激的方向规范表示。然而,以单词为中心的忽视阅读障碍和更一般的注意过程之间的关系没有得到很好的描述。这里,我们调查了在以单词为中心的忽视阅读障碍的情况下，注意力负荷操纵的影响。这项研究提供了一个案例的数据，患者CD,谁表现出同质的以单词为中心的忽视阅读障碍与严重的结合，对比配置中心的忽视。CD显示出完整的能力，可以用视觉呈现的单词命名所有字母，但承诺忽视阅读障碍的错误时，随后要求阅读相同的单词作为一个整体。患者CD的忽视阅读障碍的严重程度未发现受注意操作的影响。我们发现暴露时间或视觉拥挤对忽视阅读障碍错误的频率没有影响。这种缺乏明显的，右翼化的感知赤字，并存的左侧以物体为中心的忽视，对注意力负荷操作不敏感表明，以单词为中心的忽视阅读障碍的缺陷与广泛的视觉空间注意力无关。这些发现表明，忽视阅读障碍和领域一般视觉空间忽视可能不像以前断言的那样相关。
