WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Woman undergoing biofeedback testing, showing electrodes connected to her forehead & sensors attached to her fingers, connected to monitoring equipment in background. Biofeedback is a type of relaxation technique which uses visual & auditory stimuli with monitoring devices to bring about a reduction in metabolic rate & blood pressure. How the technique works is unclear, but it is claimed that it can control pulse rate & blood pressure, relax spastic muscles and also control migraine (severe headache) attacks.
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