Other treatments for tinnitus include cognitive-behavioral therapy, biofeedback, and electrical stimulation. Relaxation techniques, such as meditation, yoga, hypnosis, and biofeedback, have seen some results with tremors. Biofeedback and physical therapy have been used in treatment. Narayan Murthy's enduring commitment to the principles of behavioural therapy and biofeedback. Such techniques included elements such as breathing, visualization, and biofeedback. Hemoencephalography or HEG biofeedback is a functional infrared imaging technique. Time voiding while urinating and bladder training are techniques that use biofeedback. As in biofeedback, bidirectional change in physiological activity is possible. Other treatments may include biofeedback or in rare cases surgery. The Pelvic Muscle Dysfunction Biofeedback areas include&colon; I. Applied Psychophysiology and Biofeedback, II. Brown (1970) demonstrated the clinical use of alpha-theta biofeedback. Injections may be helpful when used together with biofeedback training. In the first experimental demonstration of biofeedback Shearn used these procedures with heart rate. Lindsley (1935) found that relaxed subjects could suppress motor unit firing without biofeedback training. Research into biofeedback peripherals is set to greatly improve the accuracy of such systems.