Murphy, Terence M. Department of Anesthesiology, School of Medicine, University of Washington, Seattle, Washington.
Last reviewed:January 2020
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An experience of discomfort, primarily associated with tissue damage. Pain involves somesthetic sensations that are generally unpleasant and often cause suffering or distress. Pain (see illustration) is more complex than other sensory systems, such as vision or hearing. It not only involves the transfer of sensory information to the nervous system, but it produces suffering, which then leads to aversive corrective behavior. See also: Molecular components of itch, pain, and touch sensation; Nervous system (vertebrate); Sensation; Somesthesis
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