n.
Information supplied instantaneously about an individual's own physiological processes.
Data concerning cardiovascular activity ( blood pressure and heart rate), temperature, brain waves, or muscle tension is monitored electronically and returned or "fed back" to the individual through a gauge on a meter, a light, or a sound. The goal is for the patient to use that biological data to learn to voluntarily control the body's reactions to stressful external events. A type of behaviour therapy , biofeedback training is sometimes used in combination with psychotherapy to help patients understand and change their habitual reactions to stress. Complaints treated through biofeedback include migraine headache s, gastrointestinal problems, high blood pressure, and epileptic seizures.