Surgery – Truss – Pad
Patent
1986-08-04
1987-11-10
Cohen, Lee S.
Surgery
Truss
Pad
364417, A61B 504
Patent
active
047050497
ABSTRACT:
An electroencephalograph (EEG) system for the detection of a patient's brain waves includes a group of electrodes removably attached to the patient's scalp, low-noise high-gain amplifiers and analog/digital converters. A digital comb filter is used to improve the signal-to-noise ratio and has self-optimizing capability. In the digital comb filter, the band pass frequencies are automatically selected by comparing, at each tooth of the comb, the phase variance parameter, under the brain conditions of the presence and absence of a synchronized stimulus producing an evoked potential brain wave.
REFERENCES:
patent: 4603703 (1986-08-01), McGill et al.
John et al., "Normative Values . . . Detection", Electroen & Clin. Neur, 1982, 54: 153-160.
Friedman et al, "Application of Digital . . . Potential", Electroen & Clin Neur., 1982, 53: 405-416.
Wallingford et al, "A Dynamic . . . Analyzer", IEEE Trans Instr. and Measurement, vol. 27, No. 1, Mar. 1978, pp. 70-73.
Wheeler et al, "Real-Time . . . Neural Signals", Med. & Biol Eng & Comp., May 1985, pp. 243-247.
Hamer et al, "Digital Filtering of Phys. Signals . . . ", Med & Biol Eng & Computing, pp. 274-278, May 1985.
Cohen Lee S.
Gerber Eliot S.
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