Monthly
160 pp. per issue
8 1/2 x 11, illustrated
Founded: 1989
ISSN 0898-929X
E-ISSN 1530-8898
2008 ISI Impact Factor: 4.867
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June 2005, Vol. 17, No. 6, Pages 954-968
Posted Online March 13, 2006.
(doi:10.1162/0898929054021166)
© 2005 Massachusetts Institute of Technology
Subliminal Convergence of Kanji and Kana Words: Further Evidence for Functional Parcellation of the Posterior Temporal Cortex in Visual Word Perception Kimihiro NakamuraEHESS/CNRS/ENS, Paris, France University of Tokyo Stanislas DehaeneService Hospitalier Frédéric Joliot, CEA/DSV, Orsay, France Antoinette JobertService Hospitalier Frédéric Joliot, CEA/DSV, Orsay, France Denis Le BihanService Hospitalier Frédéric Joliot, CEA/DSV, Orsay, France Sid KouiderService Hospitalier Frédéric Joliot, CEA/DSV, Orsay, France INSERM U421, Facultéde Médecine Paris XII-IM3, Créteil, France
Recent evidence has suggested that the human occipito-temporal region comprises several subregions, each sensitive to a distinct processing level of visual words. To further explore the functional architecture of visual word recognition, we employed a subliminal priming method with functional magnetic resonance imaging (fMRI) during semantic judgments of words presented in two different Japanese scripts, Kanji and Kana. Each target word was preceded by a subliminal presentation of either the same or a different word, and in the same or a different script. Behaviorally, word repetition produced significant priming regardless of whether the words were presented in the same or different script. At the neural level, this cross-script priming was associated with repetition suppression in the left inferior temporal cortex anterior and dorsal to the visual word form area hypothesized for alphabetical writing systems, suggesting that cross-script convergence occurred at a semantic level. fMRI also evidenced a shared visual occipito-temporal activation for words in the two scripts, with slightly more mesial and right-predominant activation for Kanji and with greater occipital activation for Kana. These results thus allow us to separate script-specific and script-independent regions in the posterior temporal lobe, while demonstrating that both can be activated subliminally.
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