Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Staud, Roland, Carpenter, Rachel, Godfrey, Melyssa, Robinson, Michael E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2022
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
_version_ 1784753831713701888
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
work_keys_str_mv AT staudroland handsizeestimatesoffibromyalgiapatientsareassociatedwithclinicalandexperimentalpain
AT carpenterrachel handsizeestimatesoffibromyalgiapatientsareassociatedwithclinicalandexperimentalpain
AT godfreymelyssa handsizeestimatesoffibromyalgiapatientsareassociatedwithclinicalandexperimentalpain
AT robinsonmichaele handsizeestimatesoffibromyalgiapatientsareassociatedwithclinicalandexperimentalpain