(12) ひらがな単語黙読時における時空間的脳活動の推定
豊島恒，山ノ井髙洋，山﨑敏正，大西真一
北海学園大学工学部研究報告, 第37号, pp.51-57, 2010-2
The authors recorded nineteen-channel event-related potentials (ERPs) during recognition of one type of Japanese character; 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 three Hiragana characters. Three subjects were instructed to press a button if he could understand the meaning of visual stimuli after 3000ms poststimulus. Equivalent current dipole source localization (ECDL) with three unconstrained ECD was applied to the ERPs. The ECDs were localized to the Wernicke's area at around 600ms. The latter ECD for one left-handed subject was located at Wernicke’s homologue. After that ECDs were localized to the prefrontal area, the superior frontal gyrus and the middle frontal gyrus. Then at around 800ms, the ECDs were localized to the Broca's area and after that ECDs were localized againted to the Wernicke's area and then to Broca's area at around 970ms.
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