Biofeedback: Biofeedback is a tool for reducing stress and pain through the measurement of muscle tension. It is an electronic system that monitors and informs the subject about the level of activity of the autonomic nervous system. This allows the subject to learn to move into deeper relaxation levels in order to reduce the stress and pain.
Biofeedback can also be used as a treatment technique in which people can be trained to improve their health by using signals from their own bodies. An example of such would be physical therapists analyzing stroke victims to try to help them regain movement in otherwise paralyzed muscles. Psychologists use biofeedback to help clients and patients lean to relax or help them cope with emotional or physical pain the may endure.