Procedure. A process in which a person learns to influence reliably physiologic responses of two kinds: those that are not ordinarily under voluntary control or those that ordinarily are easily regulated but for which regulation has broken down because of trauma or disease. Psychology. A process that uses instrumentation to give a person immediate and continuing signals of change in his bodily function of which he is usually unaware. Biofeedback is the process of gaining greater awareness of many physiological functions primarily using instruments that provide information on the activity of those same systems, with a goal of being able to manipulate them at will. Some of the processes that can be controlled include brainwaves, muscle tone, skin conductance, heart rate and pain perception. Biofeedback may be used to improve health, performance, and the physiological changes that often occur in conjunction with changes to thoughts, emotions, and behavior. Eventually, these changes may be maintained without the use of extra equipment, even though no equipment is necessarily required to practice biofeedback. An OSH glossary used in safety and health at work which is, adopted by ILO