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.

以单词为中心的疏忽阅读障碍通常被认为是由视觉空间疏忽样的注意力不足引起的，这种注意力不足会影响视觉刺激的方向-规范表示。但是，以单词为中心的忽视阅读障碍与更广泛的注意过程之间的关系没有得到很好的描述。在这里，我们调查了以单词为中心的忽视阅读障碍情况下注意负荷操作的影响。

这项研究提供了来自单例患者CD的数据，该患者CD表现出以同病字为中心的忽视诵读困难症以及严重的对侧同心异体忽视。CD表现出了完整的能力，可以在视觉呈现的单词中命名所有字母，但是当随后要求阅读整个单词时，却犯了忽略阅读障碍的错误。未发现患者CD忽视阅读障碍的严重程度受注意操作的影响。我们发现暴露时间或视觉拥挤对忽略阅读障碍错误的频率没有影响。缺乏明显的，右偏的知觉缺陷，共病的左偏的，以对象为中心的疏忽以及对注意负荷操纵的不敏感表明，以单词为中心的疏忽阅读障碍的潜在缺陷与广泛的视觉空间注意无关。