Spatiotemporal localization of brain activity on recalling Kanji homophones

Abstract

The authors recorded nineteen-channel event-related potentials (ERPs) during recalling one type of Japanese character; Kanji (Chinese characters). A word was presented to the subject. Each word consists of Hiragana characters(one type of phonetic characters) that has corresponding Kanji homophones. Meantime ERPs were recorded on a PC. The equivalent current dipole source localization (ECDL) with three unconstrained ECD was applied to the ERPs. The ECDs for one left-handed subject were localized to the angular jyrus homologue arond the latency of 400ms. After that ECDs were localized to the inferior temporal area around 460ms, to the inner post inferior temporal area, then to the hippocampus around 540ms.