Myelinated nociceptive afferents account for the hyperalgesia that follows a burn to the hand

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Science  25 Sep 1981:
Vol. 213, Issue 4515, pp. 1527-1529
DOI: 10.1126/science.7280675


Monkeys and human subjects were exposed to a series of thermal stimuli before and after a 53 degrees C, 30-second burn to the glabrous skin of the hand. The responses of C- and A-fiber nociceptive afferents in the monkeys and subjective responses by the humans were compared. The burn resulted in increased sensitivity of the A fibers, decreased sensitivity of the C fibers, and increased pain sensibility (hyperalgesia) in the human subjects.