Katz R B, Sevush S
Department of Neurology, Boston University School of Medicine.
Brain Lang. 1989 Aug;37(2):266-89. doi: 10.1016/0093-934x(89)90019-9.
Position-specific errors in word reading are usually associated with neglect or visual extinction on the same side as the reading problem. In this study, two patients with left-hemisphere lesions showed visual extinction on the right but reading difficulty on the left side of words and pseudowords. Further study of one patient revealed that he also had problems reading the beginning of words presented tachistoscopically or in vertical orientation. In addition, the positional difficulty was apparent when he named the letters in words. The pattern of results indicates that the positional dyslexia in these patients was not likely attributable to general deficits in visual perception or attention but may have reflected a disorder at a later stage of letter processing.
单词阅读中特定位置的错误通常与阅读问题同侧的忽视或视觉消退有关。在本研究中，两名左半球病变患者在右侧出现视觉消退，但在单词和假词的左侧存在阅读困难。对其中一名患者的进一步研究发现，他在快速呈现或垂直方向呈现的单词开头阅读也有问题。此外，当他说出单词中的字母时，位置困难也很明显。结果模式表明，这些患者的位置性阅读障碍不太可能归因于视觉感知或注意力的一般缺陷，而可能反映了字母处理后期的一种障碍。
