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Neural mechanism of reading Yasuhisa Sakurai 1 1Department of Neurology, Mi-tsui Memorial Hospital Keyword: 二重回路説 , dual-route hypothesis , 純粋失読 , pure alexia , 失読失書 , alexia with agraphia , 逐字読み , letter-by-letter reading pp.745-753
Published Date 2003/10/10
DOI https://doi.org/10.11477/mf.1431100358
  • Abstract
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 Neural mechanism of reading was reviewed with special reference to neurological lesion-to-symptom analyses, a cognitive neuropsychological model, and neuroimaging studies. To account for the findings of these studies, a weighted-dual route hypothesis for reading was proposed. According to this hypothesis, pure alexia without a splenial lesion is classified into the fusiform type and the posterior occipital type:the fusiform type is an impairment of access to the orthographic information that is stored in the posterior inferior temporal cortex, whereas the posterior occipital type is an impairment at the level of character recognition, leading to letter-by-letter reading. Alexia with agraphia for kanji from the posterior inferior temporal lesion results from damage to the orthography per se.


Copyright © 2003, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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