The Basics - essential and helpful information:

Defining Biofeedback
Biofeedback is "the use of an instrument or device that measures something biological -- that's where the "bio" part of biofeedback comes from. And it makes that information available to the person in real time -- in the instant that it is occurring. The person can then use that information that is being fed back to them as part of a process to alter whatever is going on with them that is of concern." (Dr. Dan Chartier, "Biofeedback Training Helps Reduce Stress of Surgery," Health and Healing in the Triangle).

Defining Neurofeedback
Neurofeedback, or EEG Biofeedback, is a training process that provides an individual with direct, real-time information about his or her brainwave activity. The person then uses the brainwave feedback to learn how to alter the brainwaves in a healthier, better functioning direction. This learning process could be thought of as an exercise program for the brain or like a dancer using a mirror to learn a new choreography.

Defining Psychophysiological Therapy
As we think, so the body tends to be directed. That is not to suggest that people are to blame for their illness. It's far too complex to express in such a simple way. But we do know that attitude, mental perspective, and mental and emotional awareness of what's happening physically makes a great difference -- in the development of illness, the course of an illness, and the healing of an illness." (Dr. Dan Chartier, "Treat Diabetes with Biofeedback? The Result is Often Surprising," Health and Healing in the Triangle).

How does Biofeedback/Neurofeedback work?
The common medical thermometer is a simple biofeedback instrument; a thermometer monitors the body and provides temperature readings, which guide the patient toward an appropriate healing response. Biofeedback and Neurofeedback use computerized electronic instruments to obtain information and provide feedback for treating muscular, neural, and other health challenges. The client becomes an active player in his or her relief from pain, recovery from accident and illness, or peak performance training by learning self-regulation skills.