Soft ionic-hydrogel electrodes for electroencephalography signal recording

被引:28
|
作者
Sheng, XinJun [1 ,2 ]
Qin, Zhun [1 ]
Xu, HaiPeng [1 ]
Shu, XiaoKang [1 ]
Gu, GuoYing [1 ,2 ]
Zhu, XiangYang [1 ,2 ]
机构
[1] Shanghai Jiao Tong Univ, Inst Robot, Sch Mech Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, State Key Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China
基金
国家重点研发计划; 中国国家自然科学基金;
关键词
brain-computer interface; EEG; electrodes; ionic hydrogel; soft materials; GEL-FREE ELECTRODES; EEG; IMPEDANCE;
D O I
10.1007/s11431-020-1644-6
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Wet gel electrodes have been widely used for electroencephalography (EEG) signal recording, which generally causes skin abrasion and longer preparation time. In this paper, we present soft ionic-hydrogel based electrodes to overcome such drawbacks. In order to conveniently measure the EEG signals, we design the claw-like and patch-like structures for robust connection between metal (Ag/AgCl) electrodes and skin scalps. Next, we experimentally show that the soft ionic-hydrogel based electrodes have similar performance with the conventional wet gel electrodes in terms of the short-circuit noise, electrical impedance, and skin-electrode contact impedance on unprepared human skin, significantly better than dry electrodes and water-based electrodes. We further perform the EEG measurements and steady-state visual evoked potentials (SSVEP) experiments with five subjects to verify the effectiveness of the soft ionic-hydrogel based electrodes. The experimental results demonstrate that our developed soft ionic-hydrogel electrodes can record high-quality EEG signals in a fast and clean way, being a compelling option for EEG-based brain-computer interfaces.
引用
收藏
页码:273 / 282
页数:10
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