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J Neural Eng. 2014 Aug;11(4):046014.
Hoon Lee J, Min Lee S, Jin Byeon H, Sook Hong J, Suk Park K, Lee SH.
Department of Bio-convergence Engineering, College of Health Science, Korea University, Seoul 136-100, Korea.
Abstract
OBJECTIVE:
Current electroencephalogram (EEG) monitoring systems typically require cumbersome electrodes that must be pasted on a scalp, making a private recording of an EEG in a public place difficult. We have developed a small, user friendly, biocompatible electrode with a good appearance for inconspicuous EEG monitoring.
APPROACH:
We fabricated carbon nanotube polydimethylsiloxane (CNT/PDMS)-based canal-type ear electrodes (CEE) for EEG recording. These electrodes have an additional function, triggering sound stimulation like earphones and recording EEG simultaneously for auditory brain-computer interface (BCI). The electrode performance was evaluated by a standard EEG measurement paradigm, including the detection of alpha rhythms and measurements of N100 auditory evoked potential (AEP), steady-state visual evoked potential (SSVEP) and auditory steady-state response (ASSR). Furthermore, the bio- and skin-compatibility of CNT/PDMS were tested.
MAIN RESULTS:
All feasibility studies were successfully recorded with the fabricated electrodes, and the biocompatibility of CNT/PDMS was also proved.
SIGNIFICANCE:
These electrodes could be used to monitor EEG clinically, in ubiquitous health care and in brain-computer interfaces.
