The invention contemplates that brain waves, preferably mu rhythm waves of an individual, can control a cursor on a video monitor or other device in the environment. Such communication via mu rhythms is optimized both in real time, and by stored data. The mu rhythms are detected, filtered, and amplified, as an individual sits facing a video, or other display screen. The scalp of the individual has electrodes placed in approximately 64 locations, for monitoring the mu rhythms of the alpha band and/or other EEG rhythms. An ear lobe electrode provides a reference. The electrode signals are fed to a channel differential amplifier which amplifies the difference between the 64 channels and the reference electrode. The signals are digitized and spatially filtered. The resulting signals are submitted to a frequency analysis periodically. The powers n specific frequency bands of specific signals are the independent variables for equations used to control cursor movement. Each variable consists of the amplitude at a specific frequency in a specific signal. Two control channels are provided: one for horizontal movement, and the other for vertical movement. Each control channel is defined by a linear or other equation. The intercept of each equation is based on an average of values of the independent variables that have been stored or recorded from the previous performance of the individual. The cursor moves a plurality of times per second in accordance with the analysis scanning frequency. Movement of the cursor to different portions of the screen can control other processes and devices by invoking programmed commands displayed thereon.