脑-机接口
脑电图
可穿戴计算机
电极
功能性电刺激
计算机科学
接口(物质)
电阻抗
生物医学工程
材料科学
神经科学
医学
电气工程
刺激
心理学
工程类
嵌入式系统
化学
最大气泡压力法
并行计算
物理化学
气泡
作者
Ju-Chun Hsieh,Hussein Alawieh,Yang Li,Fumiaki Iwane,Linran Zhao,Richard A. Anderson,Syed Ibtisam Abdullah,Kai Wing Kevin Tang,Wenliang Wang,Ilya Pyatnitskiy,Yaoyao Jia,José del R. Millán,Huiliang Wang
标识
DOI:10.1016/j.bios.2022.114756
摘要
To date, brain-computer interfaces (BCIs) have proved to play a key role in many medical applications, for example, the rehabilitation of stroke patients. For post-stroke rehabilitation, the BCIs require the EEG electrodes to precisely translate the brain signals of patients into intended movements of the paralyzed limb for months. However, the gold standard silver/silver-chloride electrodes cannot satisfy the requirements for long-term stability and preparation-free recording capability in wearable EEG devices, thus limiting the versatility of EEG in wearable BCI applications over time outside the rehabilitation center. Here, we design a long-term stable and low electrode-skin interfacial impedance conductive polymer-hydrogel EEG electrode that maintains a lower impedance value than gel-based electrodes for 29 days. With this technology, EEG-based long-term and wearable BCIs could be realized in the near future. To demonstrate this, our designed electrode is applied for a wireless single-channel EEG device that detects changes in alpha rhythms in eye-open/eye-close conditions. In addition, we validate that the designed electrodes could capture oscillatory rhythms in motor imagery protocols as well as low-frequency time-locked event-related potentials from healthy subjects, with similar or better performance than gel-based electrodes. Finally, we demonstrate the use of the designed electrode in online BCI-based functional electrical stimulation, which could be used for post-stroke rehabilitation.
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