Saffran Eleanor M, Coslett H Branch
Cogn Neuropsychol. 1998 Mar 1;15(1-2):141-165. doi: 10.1080/026432998381249.
Recent studies of pure alexia present a contradictory picture. Despite evidence of impaired letter identification in letter-by-letter readers, some patients are able to carry out lexical decision and other tasks under conditions of rapid presentation, although they are seldom able to identify these stim uli explicitly. We review evidence for both facets of pure alexic performance and offer an accountof this pattern in terms ofright-and left-hemisphere reading mechanisms. Specifically, we suggest that the right hemisphere supports performance in covert reading tasks, and that letter-by-letter reading is the product of the left hemisphere, operating on information transmitted from the right.
近期关于纯失读症的研究呈现出相互矛盾的情况。尽管有证据表明逐字母阅读者存在字母识别受损的问题，但一些患者在快速呈现的条件下仍能够进行词汇判断和其他任务，尽管他们很少能够明确识别这些刺激。我们回顾了纯失读症表现这两个方面的证据，并从左右半球阅读机制的角度对这种模式进行了解释。具体而言，我们认为右半球支持隐蔽阅读任务中的表现，而逐字母阅读是左半球对从右半球传输的信息进行操作的产物。
