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Trends Neurosci. 2010 Dec;33(12):550-8. doi: 10.1016/j.tins.2010.09.002. Epub 2010 Nov 5.

The multiple pathways for itch and their interactions with pain.

Author information

  • 1Pain Center and Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110, USA. davidsons@morpheus.wustl.edu

Abstract

Multiple neural pathways and molecular mechanisms responsible for producing the sensation of itch have recently been identified, including histamine-independent pathways. Physiological, molecular, behavioral and brain imaging studies are converging on a description of these pathways and their close association with pain processing. Some conflicting results have arisen and the precise relationship between itch and pain remains controversial. A better understanding of the generation of itch and of the intrinsic mechanisms that inhibit itch after scratching should facilitate the search for new methods to alleviate clinical pruritus (itch). In this review we describe the current understanding of the production and inhibition of itch. A model of itch processing within the CNS is proposed.

Copyright © 2010 Elsevier Ltd. All rights reserved.

PMID:
21056479
[PubMed - indexed for MEDLINE]
PMCID:
PMC2991051
Free PMC Article

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