| The Pleasurability of Scratching an Itch: A Psychophysical and Topographical Assessment. | |
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MedLine Citation:
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PMID: 22242789 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Background: Scratching an itch is perceived as being pleasurable. However, an analysis of topographical variations in itch intensity, the effectiveness of scratching to provide itch relief and the associated pleasurability has not been performed at different body sites. Objective: To examine the role of scratching pleasurability in providing itch relief by investigating whether itch intensity is perceived differently at 3 different sites and to assess a potential correlation between the pleasurability and itch attenuation induced by scratching. Methods: Itch was induced on the forearm, ankle and back using cowhage spicules in eighteen healthy subjects. These sites were subsequently scratched by an investigator with a cytology brush immediately following itch induction. The intensity of itch with and without scratching at these sites and the pleasurability of scratching were recorded by taking VAS ratings at 30 seconds intervals. Results: Average itch intensity and scratching pleasurability ratings at the ankle and back were significantly higher than on the forearm. For the forearm and ankle, the higher the itch while scratching, the higher was the pleasurability. A higher baseline itch was linked to a higher itch reduction secondary to scratching in all tested areas. Pleasurability paralleled the curve of itch reduction for the back and forearm, however scratching pleasurability at the ankle remained elevated and only slightly decreased while itch was diminishing. Conclusions: There are topographical differences in itch intensity, the effectiveness of scratching in relieving itch and the associated pleasurability. Experimental itch induced by cowhage was more intensely perceived at the ankle, while scratching attenuated itch most effectively on the back. |
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Authors:
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G A Bin Saif; A D P Papoiu; L Banari; F McGlone; S G Kwatra; Y-H Chan; G Yosipovitch |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-13 |
Journal Detail:
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Title: The British journal of dermatology Volume: - ISSN: 1365-2133 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-16 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0004041 Medline TA: Br J Dermatol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 British Association of Dermatologists. |
Affiliation:
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Departments of Dermatology Neurobiology & Anatomy Regenerative Medicine; Wake Forest School of Medicine; Winston-Salem, North Carolina, U.S.A. School of Natural Sciences and Psychology, Liverpool John Moores University; Liverpool, U.K. Department of Dermatology, College of Medicine, King Saud University, Riyadh, Saudi Arabia Biostatistics Unit, Yong Loo Lin School of Medicine, National University Health System, Singapore. |
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