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.
Dental Research Center, University of North Carolinia, Chapel Hill 27599-7455 USA.
W J
WJ
Dunseath
E F
EF
Kelly
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*