Abstract
This paper proposes a candle-like microneedle electrode for electroencephalogram (EEG) measurement from the hairy part of the scalp. In the previous report, we successfully measured EEG from the frontal pole by using a polymer-based dry microneedle electrode. However, this electrode could not measure EEG from the hairy part of the scalp because hairs obstructed contact between microneedles and the scalp. Therefore in this paper, we fabricated candle-like microneedle electrode which can avoid hairs. The pillars help the micro-needles to avoud hair and reach the scalp surface. We experimentally verified that the candle-like microneedle electrode with pillars of 0.6 mm diameter could effectively avoid hairs and measure EEG from the hairy part of the scalp. We believe that this dry electrode, which is mechanically robust, can measure EEG from any parts, and does not need any skin preparation, is readily applicable to EEG measurement for medical and ICT applications.
