Patient, Heal Thyself

Biofeedback moves toward the mainstream

Stroke survivors who are partly paralyzed have a tough time re-educating muscles to respond to mental cues. Biofeedback, a technique much derided by physicians in the past, is proving to be a most effective teaching aid. A patient's hand, say, is hooked up to a machine that measures muscle tension. The patient then tries to close her hand. Her mind tells the muscle to tighten. The hand doesn't move.

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