2020年10月1日
Coaxial microneedle-electrode for multichannel and local-differential recordings of neuronal activity
Sensors and Actuators, B: Chemical
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- 巻
- 320
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- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.snb.2020.128442
Electrophysiological recording requires low invasive electrode geometry in the tissue and high-quality signal acquisitions. Here we propose a <10-μm diameter coaxial cable–inspired needle electrode, which consists of a core electrode in the needle surrounded by another shell electrode. The neuronal recording capability of these electrodes was confirmed by multichannel recording of a mouse cortex in vivo. Given that the shell electrode played the role of a reference electrode, the coaxial electrode also enabled a differential recording at the local area within the tissue. Compared to the recording without the referenced shell electrode, the differential recording demonstrated a twofold higher signal-to-noise ratio, while the firing rate increased. These results suggest that the coaxial microneedle-electrode will provide high-quality neuronal signals in electrophysiological recordings including ex vivo and in vitro applications, similar to the in vivo recording.
- リンク情報
- ID情報
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- DOI : 10.1016/j.snb.2020.128442
- ISSN : 0925-4005
- ORCIDのPut Code : 85559614
- SCOPUS ID : 85086568697