Biofeedback is a procedure in which a person learns to control through conscious thought internal physiological processes such as blood pressure, heart and respiration rate, skin temperature, sweating and the constriction of particular muscles.
Biofeedback is the information feedback to individuals about their biological functions. Using biofeedback it is possible for people to gain a certain amount of control over such functions as heart rate, blood pressure and brain waves through a kind of operant conditioning process.