CNT/PDMS-based canal-typed ear electrodes for inconspicuous EEG recording

J Neural Eng. 2014 Aug;11(4):046014. doi: 10.1088/1741-2560/11/4/046014. Epub 2014 Jun 25.

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.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Alpha Rhythm / physiology
  • Biocompatible Materials
  • Brain-Computer Interfaces
  • Dimethylpolysiloxanes*
  • Ear Canal*
  • Electrodes*
  • Electroencephalography / instrumentation*
  • Evoked Potentials, Auditory / physiology
  • Evoked Potentials, Visual / physiology
  • Female
  • Humans
  • Male
  • Materials Testing
  • Nanotubes, Carbon*
  • Prosthesis Design
  • Young Adult

Substances

  • Biocompatible Materials
  • Dimethylpolysiloxanes
  • Nanotubes, Carbon
  • baysilon