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(9) Dominance of recognition of words presented on right or left eye
-Comparison of Kanji and Hiragana-

¡¡IPMU 2004 (Information Processing and Management of Uncertainty in Knowledge-Based Systems 2004) ProceedingsVol.2,pp.1167-1173, 2004-7

¡¡The authors recorded nineteen-channel event-related potentials (ERPs) during recognition of two types of Japanese character; 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 at the occipital, lingual and inferior temporal gyri at 200?350ms, and those at Wernicke¡Çs area at 350?600ms. The latter ECD for one left-handed subject was located at Wernicke¡Çs homologue. 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 right-handed ones.

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