Authors
Laurent Cohen, Olivier Martinaud, Cathy Lemer, Samson Lehéricy, Yves Samson, Michaël Obadia, Andrea Slachevsky, Stanislas Dehaene
Publication date
2003/12/1
Journal
Cerebral cortex
Volume
13
Issue
12
Pages
1313-1333
Publisher
Oxford University Press
Description
According to a simple anatomical and functional model of word reading, letters displayed in one hemifield are first analysed through a cascade of contralateral retinotopic areas, which compute increasingly abstract representations. Eventually, an invariant representation of letter identities is created in the visual word form area (VWFA), reproducibly located within the left occipito-temporal sulcus. The VWFA then projects to structures involved in phonological or lexico-semantic processing. This model yields detailed predictions on the reading impairments that may follow left occipitotemporal lesions. Those predictions were confronted to behavioural, anatomical and functional MRI data gathered in normals and in patients suffering from left posterior cerebral artery infarcts. In normal subjects, alphabetic stimuli activated both the VWFA and the right-hemispheric symmetrical region (R-VWFA) relative to fixation, but …
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