Appeal No. 96-2635 Application 07/993,050 APPENDED CLAIMS 1. Method of producing a communication or control signal using the mu wave from the brain of a person, comprising: monitoring the mu wave from the brain of the person; producing changes in the mu wave by performing movement or movement rehearsal by the person of a particular body part or parts of the person to attenuate the mu wave of the person in a selected pattern from the value of the mu wave when the person is neither moving nor thinking of moving; measuring said mu wave attenuation from the brain of the person caused by movement or movement rehearsal of said body part or parts of the person; converting said measured mu wave attenuation to a communication or control signal by signal processing the measured mu wave to obtain a power spectrum and comparing the peak power spectrum value to a predetermined threshold value. 14. Method comprising: placing a pair of electrodes substantially over the motor cortex of a person’s scalp, one on each side of the head; taking an EEG by measuring a voltage difference signal between the two electrodes; taking a Fast Fourier Transform (FFT) of the voltage difference signal; obtaining the power spectrum P = *FFT* of the voltage2 difference signal; comparing the peak value of the power spectrum of the mu wave in the 8-13 Hz range to a baseline value to determine whether the person is either (a) neither moving nor thinking of moving a body part, or (b) either moving or thinking of moving a body part; - A1 -Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 NextLast modified: November 3, 2007