Soft, curved electrode systems capable of integration on the auricle as a persistent brain-computer interface
Abstract
Conventional electroencephalogram (EEG) recording systems, particularly the hardware components that form the physical interfaces to the head, have inherent drawbacks that limit the widespread use of continuous EEG measurements for medical diagnostics, sleep monitoring, and cognitive control. Here we introduce soft electronic constructs designed to intimately conform to the complex surface topology of the auricle and the mastoid, to provide long-term, high-fidelity recording of EEG data. Systematic studies reveal key aspects of the extreme levels of bending and stretching that are involved in mounting on these surfaces. Examples in persistent brain-computer interfaces, including text spellers with steady-state visually evoked potentials and event-related potentials, with viable operation over periods of weeks demonstrate important advances over alternative brain-computer interface technologies.
- Publication:
-
Proceedings of the National Academy of Science
- Pub Date:
- March 2015
- DOI:
- 10.1073/pnas.1424875112
- Bibcode:
- 2015PNAS..112.3920N