▽TOP▽活動実績▽２００６年▽

(1) Dominance of recognition of words presented on right or left eye-Comparison of
　　 Kanji and Hiragana-,Modern Information Processing From Theory to Applications,
　　 ISBN-13:978-0444-52075-3,ISBN-10:0-444-52075-9, pp.407-416,ELSVIER,2006

　The authors recorded nineteen-channel event-related potentials (ERPs) during recognition of two types of Japanese characters; Kanji (Chinese characters) and Hiragana (one type of phonetic characters). By field-sequential stereoscopic 3D display with liquid crystal shutter, a word and a non-word were simultaneously and independently presented to the left (right) eye and right (left) one, respectively. Each word consists of two Kanji or three Hiragana characters. Three subjects were instructed to press a button when understanding the meaning of the visual stimuli after 3000 ms poststimulus. Equivalent current dipole source localization (ECDL) with three unconstrained ECD was applied to the ERPs. For both Kanji and Hiragana, the ECDs were localized to the occipital, lingual and inferior temporal gyri at 200 ? 350ms, and those at Wernicke’s area at 350 ? 600ms. The latter ECD for one left-handed subject was located at Wernicke’s homologue. The Kanji recognition revealed the activation of the fusiform and supramarginal gyri which may reflect binocular rivalry and spatial working memory. During the Hiragana recognition task, one of the ECDs was located at the angular gyrus which is related to phonological processing. For one left-handed subject, the inferior parietal ECDs were localized contralaterally to those of right-handed subjects.