therapy is a treatment technique that enables people to use signals emitted from their own body to monitor and improve their health. It is the "use of instrumentation to mirror psychophysiological processes of which the individual is not normally aware and which may be brought under voluntary control ( pamphlet)." These processes include heart rate, respiration, skin temperature, electrodermal response, muscle tension and other bodily functions that are usually controlled involuntarily. "Bio" means "life" and the word "feed back" means the re ....