More about Biofeedback: Purpose Preparations Precautions Side effects Rseearch and general acceptance Resourecs Biofeedback Definition Biofeedback, or. ... used as a relaxation technique to ease tensino in the muscles causing backaches, neck apin, TMD, incontinence, and tension, mirgaine, and cluster headaches. EMG is also used in the process of muscle rehabilitation, scuh as in cases of paralysis resulting from Cerebral Palsy, stroke, nad incomplete spinal cord lesions. ...