Abstract
This paper describes a utility of dry micro-needle electrodes in measurement of electroencephalogram (EEG). Usual wet electrodes need abrasion of stratum corneum and pasting of electrolyte paste as preparation of measurement. Therefore, it would be unpleasant for subjects and time-consuming for experimenters. Thereupon, we developed dry micro-needle electrodes which can measure EEG on hairy scalp. The electrodes avoid hair by pillar and penetrate stratum corneum by micro-needles. In our previous research, it has been proven that our electrodes obtain EEG in same quality to wet electrodes. However, our electrodes have not proposed utilities in many fields. For proving the utility, we conducted ERPs measurement, which is commonly used in psychology and medical science, with oddball task. The oddball task was done with 3 phonetic stimulations /itta/, /itte/ and /itta?/. As a result, P300 was extracted from EEG which was evoked by task. Therefore, the utility of electrode in many fields was proved.
