Spatiotemporal localization and comparison of brain activity on recalling one character Kanji homophone

Abstract

The authors measured electroencephalograms (EEGs) from subjects looking at words hiragana (Japanese alphabet), and recalling one character Kanji homophone. The words are presented to the subject at random. Each word consists of some Hiragana characters, and has some one character Kanji homophones. The equivalent current dipole source localization (ECDL) method is applied to the event related potentials (ERPs): summed EEGs. ECDs are localized to the primary visual area V1, to the ventral pathway (ITG: inferior temporal gyrus), and to the Broca's area, etc. In addition ECDs are localized to the hippocampus, to the parahippocampal gyrus (ParaHip) and to the fusiform gyrus (FuG), etc. We compared the difference in localized results between subjects.