Active “itch fibers” in chronic pruritus
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Abstract
An itch-specific neuronal pathway was recently discovered in healthy humans and animals. Here the authors report that activity in this specific pathway coincides with itch under pathophysiologic conditions in a patient with chronic pruritus. Microneurographic recordings from the symptomatic area revealed spontaneous activity in six single C-fiber afferents that had the characteristic features of “itch fibers.” Itch may be caused by activity in a specific subpopulation of C-fiber afferents.
- Received July 15, 2002.
- Accepted April 22, 2003.
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