Medical Definition of antinociception
: the action or process of blocking the detection of a painful or injurious stimulus by sensory neurons <Compared with systemic narcotic analgesia, intraspinal narcotic antinociception has a longer duration.—Dennis W. Coombs, The Journal of the American Medical Association, 4 Nov. 1983>
antinociceptive\-ˌnō-si-ˈsep-tiv\ play adjective <… the antinociceptive action of morphine and endogenous opiates apparently proceeds by opening of the same class of neuronal potassium channels blocked by apamin.—David Gurwitz, The Lancet, 23 Jan. 1999>
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