The method includes the steps of detecting an analog bioelectrical signal, converting the signal to discrete digital signals representing corresponding frequencies and numerically analysing the digital signals to determine the different bioelectrical frequencies emitted by the organism. A threshold amplitude associated with a selected digital signal is established and an auditory or visual signal is sent to the organism to indicate whether the bioelectrical frequency under study is within or outside the threshold ampltiude. The apparatus includes a pair of electrodes, an analog signal amplifier, an analog to digital converter and a selector to select a frequency of interest. It also includes a display monitor, and a computer to distinguish the digital signals as different frequencies, display the frequencies, and determine when the frequency is falling inside or outside a predetermined range. Also, a magnetic medium recording device is used to capture data. Finally, a lighting or sounding circuit is used to tell the organism whether the frequency under study is being inhibited or facilitated.
Electroencephalic neuro-feedback appts.