The gate control theory is a theory explaining how pain is produced and experienced by the body. This theory suggests that pain is stimulated by noxious (harmful) stimuli at nerve endings. However, the body has a "gate" which it can "shut" to stop the flow of these noxious stimuli and hence stop the sensation of pain. By stimulating nerves it is possible to artificially cause this "gate" to close and hence stop the sensation of pain in the stimulated regions.
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