System for evoking electroencephalogram signals

Details System for evoking electroencephalogram signals System for evoking electroencephalogram signals

1991-06-10

1993-09-07

Cohen, Lee S.

Surgery

Truss

Pad

600 27, A61B 504

Patent

active

052419673

ABSTRACT:
A physiological change in the body of a user such as a brain wave or EEG signal is detected by electrodes attached to the scalp of the user. A frequency signal corresponding to a brain wave to be evoked is extracted by a bandpass filter from a signal which indicates the detected physiological change. The frequency signal is then applied to a stimulus generator which converts the frequency signal to a stimulative signal such as a photic stimulus and feeds the stimulative signal back to the user's body. The brain wave to be evoked is strongly synchronized by the stimulative signal applied to the user to place the user quickly into a desired brain wave state. The stimulative signal well matches the user's body since it originates from the signal representing the physiological change in the body of the user.

REFERENCES:
patent: 3837331 (1974-09-01), Ross
patent: 3893450 (1975-07-01), Ertl
patent: 4227516 (1980-10-01), Meland et al.
patent: 4228807 (1980-10-01), Yagi et al.
patent: 4462411 (1984-07-01), Rickards

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