NATIONAL LIBRARY OF MEDICINE / SCIENCE PHOTO LIBRARY NATIONAL LIBRARY OF MEDICINE / SCIENCE PHOTO LIBRARY
Electric therapy. Historical image of a man's arm being treated by a nurse using electricity; this technique is known today as Transcutaneous Electrical Nerve Stimulation (TENS). TENS is a method of pain relief which is achieved by applying small, electrical pulses from an electrode (in the nurse's hand) placed on the skin. The treatment blocks pain messages to the brain by providing an alternative stimulus to the nerves beneath the skin. The degree and duration of pain relief varies between patients.
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