Research / 2022 / Article / Fig 1

Research Article

Ten-Hour Stable Noninvasive Brain-Computer Interface Realized by Semidry Hydrogel-Based Electrodes

Figure 1

(a) Schematic diagram of BCI applications: medical rehabilitation, typing, sleeping monitoring, and driving. (b) Gel injection process for Ag/AgCl conventional electrodes on a subject using a syringe with a needle to decrease the contact impedance between the electrode and scalp. (c) After the use of a wet electrode, a large amount of conductive gel sticks to hair and electrode cap. (d) A dry electrode cap. (e) A schematic for using AgPHMS semidry electrode on scalp, low-impedance stratum corneum benefits signal transmission.