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Multichannel PC-based data-acquisition system for high-resolution EEG

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2 Author(s)
Dunseath, W.J.R. ; Dental Res. Center, North Carolina Univ., Chapel Hill, NC, USA ; Kelly, Edward F.

Describes a complete, high-performance data-acquisition system for high-resolution EEG. The system includes preamplified EEG electrodes, rigid helmets, differential instrumentation and software-controlled gain amplifiers, digitizing and control circuitry, and optical coupling to a 486 PC. Miniaturized preamplifiers mounted on individual electrodes reduce coupling to external electromagnetic fields and minimize signal distortion caused by increased and/or imbalanced electrode impedances. Electrodes are applied quickly and with minimal skin preparation, yet with high packing densities and repositioning consistent to about 1-3 mm in repeated applications. Extensive testing under realistic conditions demonstrates that the system provides superior electrical performance compared to currently available commercial systems.

Published in:

Biomedical Engineering, IEEE Transactions on  (Volume:42 ,  Issue: 12 )