(20) Spatiotemporal study on recognition of Japanese words -Comparison
of Kanji and Hiragana-
バイオメディカルファジィシステム学会第18回年次大会講演論文集, pp.31-34, 2005-10
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
and inferior temporal gyrus at 200?400ms, and those at the Wernicke area
at 300?600ms. The latter ECD for one left-handed subject was localized at
the homologue of Wernicke area.