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Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain
INTRODUCTION: Simply inspecting one’s own body can reduce clinical pain and magnification of body parts can increase analgesia. Thus, body perceptions seem to play an important role for analgesia. Conversely, pain may also affect bodily perceptions. Therefore, we evaluated the effects of clinical an...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9312382/ https://www.ncbi.nlm.nih.gov/pubmed/35877689 http://dx.doi.org/10.1371/journal.pone.0270701 |
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author | Staud, Roland Carpenter, Rachel Godfrey, Melyssa Robinson, Michael E. |
author_facet | Staud, Roland Carpenter, Rachel Godfrey, Melyssa Robinson, Michael E. |
author_sort | Staud, Roland |
collection | PubMed |
description | INTRODUCTION: Simply inspecting one’s own body can reduce clinical pain and magnification of body parts can increase analgesia. Thus, body perceptions seem to play an important role for analgesia. Conversely, pain may also affect bodily perceptions. Therefore, we evaluated the effects of clinical and/or experimental pain on perceived hand size in fibromyalgia patients (FM) and healthy controls (HC). METHODS: To investigate the effects of chronic and/or acute pain on size perception we compared hand size estimates of 35 HC and 32 FM patients at baseline and during tonic mechanical pain stimuli applied to one ear lobe. Mechanical stimuli were adjusted for each individual pain sensitivity to achieve a rating of 4 ± 1 VAS (0–10) units. Photographs of each subject’s hands were digitally manipulated to produce a monotonic series of 5 images larger and 6 smaller than actual size which were then presented to the participants in ascending and descending order (total number of images: 12). RESULTS: FM and HC participants’ clinical pain ratings at baseline were 3.3 (3.1) and .3 (.8) VAS units, respectively. At baseline, FM participants selected significantly smaller hand images than HC as representative of their actual size (p < .02). During application of tonic experimental pain, the image size chosen to represent their actual hand size decreased significantly in FM participants and HC (p < .001) but this decrease was not different between groups (p > .05). Hand size estimates of FM participants correlated negatively with their clinical pain ratings (p < .04). CONCLUSION: The decreased hand size perception of FM patients and HC was associated with their clinical and/or experimental pain, supporting the hypothesis that pain can result in visual body distortions. |
format | Online Article Text |
id | pubmed-9312382 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-93123822022-07-26 Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain Staud, Roland Carpenter, Rachel Godfrey, Melyssa Robinson, Michael E. PLoS One Research Article INTRODUCTION: Simply inspecting one’s own body can reduce clinical pain and magnification of body parts can increase analgesia. Thus, body perceptions seem to play an important role for analgesia. Conversely, pain may also affect bodily perceptions. Therefore, we evaluated the effects of clinical and/or experimental pain on perceived hand size in fibromyalgia patients (FM) and healthy controls (HC). METHODS: To investigate the effects of chronic and/or acute pain on size perception we compared hand size estimates of 35 HC and 32 FM patients at baseline and during tonic mechanical pain stimuli applied to one ear lobe. Mechanical stimuli were adjusted for each individual pain sensitivity to achieve a rating of 4 ± 1 VAS (0–10) units. Photographs of each subject’s hands were digitally manipulated to produce a monotonic series of 5 images larger and 6 smaller than actual size which were then presented to the participants in ascending and descending order (total number of images: 12). RESULTS: FM and HC participants’ clinical pain ratings at baseline were 3.3 (3.1) and .3 (.8) VAS units, respectively. At baseline, FM participants selected significantly smaller hand images than HC as representative of their actual size (p < .02). During application of tonic experimental pain, the image size chosen to represent their actual hand size decreased significantly in FM participants and HC (p < .001) but this decrease was not different between groups (p > .05). Hand size estimates of FM participants correlated negatively with their clinical pain ratings (p < .04). CONCLUSION: The decreased hand size perception of FM patients and HC was associated with their clinical and/or experimental pain, supporting the hypothesis that pain can result in visual body distortions. Public Library of Science 2022-07-25 /pmc/articles/PMC9312382/ /pubmed/35877689 http://dx.doi.org/10.1371/journal.pone.0270701 Text en © 2022 Staud et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Staud, Roland Carpenter, Rachel Godfrey, Melyssa Robinson, Michael E. Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain |
title | Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain |
title_full | Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain |
title_fullStr | Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain |
title_full_unstemmed | Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain |
title_short | Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain |
title_sort | hand size estimates of fibromyalgia patients are associated with clinical and experimental pain |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9312382/ https://www.ncbi.nlm.nih.gov/pubmed/35877689 http://dx.doi.org/10.1371/journal.pone.0270701 |
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