Multichannel PC-based data-acquisition system for high-resolution EEG.
This paper 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.
Dunseath
W J
WJ
Dental Research Center, University of North Carolinia, Chapel Hill 27599-7455 USA.
Kelly
E F
EF
D000703:Analog-Digital Conversion; D002138:Calibration; D004566:Electrodes; D004569:Electroencephalography / Q000295:instrumentation*; D004582:Electronics, Medical / Q000295:instrumentation; D004867:Equipment Design; D006801:Humans; D008838:Microcomputers; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*