What is a biofeedback machine?

[wagner]

Biofeedback is a treatment technique in which people are trained to improve their health by using signals from their own bodies.Physical therapists use biofeedback to help stroke victims regain movement in paralyzed muscles.Specialists in many different fields use biofeedback to help their patients cope with pain.the biofeedback machine acts as a kind of sixth sense which allows to "see" or "hear" activity inside bodies.
One commonly used type of machine, for example, picks up electrical signals in the muscles. It translates these signals into a form that patients can detect: It triggers a flashing light bulb, perhaps, or activates a beeper every time muscles grow more tense. If patients want to relax tense muscles, they try to slow down the flashing or beeping.
a biofeedback machine can be as simple as a thermometer or multifunctional, flexible and state-of-the-art data acquisition platforms.