http://164.195.100.11/netacgi/nph-P...&p=1&u=/netahtml/srchnum.htm&r=1&f=G&l=50&s1='3951134'.WKU.&OS=PN/3951134&RS=PN/3951134__
United States Patent 3,951,134
Malech April 20, 1976
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Apparatus and method for remotely monitoring and altering brain waves
Abstract
Apparatus for and method of sensing brain waves at a position remote from a subject whereby electromagnetic signals of different frequencies are simultaneously transmitted to the brain of the subject in which the signals interfere with one another to yield a waveform which is modulated by the subject's brain waves. The interference waveform which is representative of the brain wave activity is re-transmitted by the brain to a receiver where it is demodulated and amplified. The demodulated waveform is then displayed for visual viewing and routed to a computer for further processing and analysis. The demodulated waveform also can be used to produce a compensating signal which is transmitted back to the brain to effect a desired change in electrical activity therein.
United States Patent 3,951,134
Malech April 20, 1976
--------------------------------------------------------------------------------
Apparatus and method for remotely monitoring and altering brain waves
Abstract
Apparatus for and method of sensing brain waves at a position remote from a subject whereby electromagnetic signals of different frequencies are simultaneously transmitted to the brain of the subject in which the signals interfere with one another to yield a waveform which is modulated by the subject's brain waves. The interference waveform which is representative of the brain wave activity is re-transmitted by the brain to a receiver where it is demodulated and amplified. The demodulated waveform is then displayed for visual viewing and routed to a computer for further processing and analysis. The demodulated waveform also can be used to produce a compensating signal which is transmitted back to the brain to effect a desired change in electrical activity therein.

