Abstract: A method for treating an individual includes selecting a reference site or sites for determining a brain wave frequency of the individual, determining an initial brain wave frequency of the individual, determining a brain wave frequency which corresponds to a highest evoked response of the individual, by use of electroencephalographic (EEG) feedback, entraining the brain wave frequency of the individual at the chosen site or sites to the brain wave frequency corresponding to the highest evoked response, and then maintaining the brain wave at that frequency for a first predetermined length of time. The highest evoked response can be the highest EEG response or the highest cerebral blood flow (CBF) of the individual or even some other measure. The CBF can be either for a selected portion of or the entire cerebrum. In one embodiment, the method includes repeating some steps. A preferred method entrains the individual back to approximately the initial brain wave frequency of the individual.

Abstract: A method for changing brain wave frequency to a desired frequency determines a current brain wave frequency of a user, generates two frequencies with a frequency difference of a magnitude between that of the current actual brain wave frequency and the desired frequency but always within a predetermined range of the current actual brain wave frequency, and produces an output to the user corresponding to the two frequencies. One apparatus to accomplish the method has a computer processor, a computer memory, EEG electrodes along with an amplifier, a programmable timing generator responsive to the computer processor for generating the two frequencies, audio amplifiers and a beat frequency generator driving a visual frequency amplifier.