Electrical Stimulation TENS/NMES
Transcutaneous electrical nerve stimulators (TENS) and electronic muscle stimulators (EMS) employ electrotherapy to treat acute and chronic pain, but the methodology differs. NMES, which stands for Neuromuscular Electrical Stimulation is considered synonymous with EMS.
TENS uses electrotherapy to stimulate the nerves and active therapeutic healing. EMS, on the other hand, sends electric impulses that cause muscle contraction. EMS units are used to help prevent atrophy of muscles, for retraining muscles (e.g. in partial paralysis) and to increase range of motion.