ひらがな単語黙読時における時空間的脳活動の推定

概要

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The authors recorded nineteen-channel event-related potentials (ERPs) during recognition ofone type of Japanese character ; Hiragana (one type of phonetic characters). By field-sequentialstereoscopic 3D display with liquid crystal shutter, a word and a non-word were simultaneouslyand independently presented to the left (right) eye and right (left) one, respectively. Each wordconsists of three Hiragana characters. Three subjects were instructed to press a button if he hadrecognized the meaning of visual stimuli after 3000ms poststimulus. Equivalent current dipolesource localization (ECDL) with three unconstrained ECD was applied to the ERPs. The ECDswere localized to the Wernicke's area at around 600ms. The ECD for one left-handed subjectwas located at Wernicke's homologue. After that ECDs were localized to the prefrontal area, thesuperior frontal gyrus and the middle frontal gyrus. Then at around 800ms, the ECDs were localizedto the Broca's area and after that ECDs were localized again to the Wernicke's area and thento Broca's area at around 970ms.
2010-02-22