{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,14]],"date-time":"2025-05-14T04:16:15Z","timestamp":1747196175639,"version":"3.40.5"},"reference-count":57,"publisher":"Public Library of Science (PLoS)","issue":"7","license":[{"start":{"date-parts":[[2022,7,25]],"date-time":"2022-07-25T00:00:00Z","timestamp":1658707200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec001\">\n<jats:title>Introduction<\/jats:title>\n<jats:p>Simply inspecting one\u2019s 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).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec002\">\n<jats:title>Methods<\/jats:title>\n<jats:p>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 \u00b1 1 VAS (0\u201310) units. Photographs of each subject\u2019s 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).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec003\">\n<jats:title>Results<\/jats:title>\n<jats:p>FM and HC participants\u2019 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 &lt; .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 &lt; .001) but this decrease was not different between groups (p &gt; .05). Hand size estimates of FM participants correlated negatively with their clinical pain ratings (p &lt; .04).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec004\">\n<jats:title>Conclusion<\/jats:title>\n<jats:p>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.<\/jats:p>\n<\/jats:sec>","DOI":"10.1371\/journal.pone.0270701","type":"journal-article","created":{"date-parts":[[2022,7,25]],"date-time":"2022-07-25T17:35:43Z","timestamp":1658770543000},"page":"e0270701","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":1,"title":["Hand size estimates of fibromyalgia patients are associated with clinical and experimental pain"],"prefix":"10.1371","volume":"17","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1317-2368","authenticated-orcid":true,"given":"Roland","family":"Staud","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3596-9797","authenticated-orcid":true,"given":"Rachel","family":"Carpenter","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9545-5312","authenticated-orcid":true,"given":"Melyssa","family":"Godfrey","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael E.","family":"Robinson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"340","published-online":{"date-parts":[[2022,7,25]]},"reference":[{"issue":"3","key":"pone.0270701.ref001","doi-asserted-by":"crossref","first-page":"431","DOI":"10.1002\/1097-4679(198605)42:3<431::AID-JCLP2270420305>3.0.CO;2-I","article-title":"Body image of anorexic, obese, and normal females","volume":"42","author":"C Bell","year":"1986","journal-title":"J Clin Psychol"},{"volume-title":"The cerebral cortex of man; a clinical study of localization of function","year":"1950","author":"W Penfield","key":"pone.0270701.ref002"},{"issue":"4","key":"pone.0270701.ref003","doi-asserted-by":"crossref","first-page":"389","DOI":"10.1093\/brain\/60.4.389","article-title":"Somatic motor and sensory representation in the cerebral cortex of man as studied by electrical stimulation","volume":"60","author":"W Penfield","year":"1937","journal-title":"Brain"},{"issue":"9","key":"pone.0270701.ref004","doi-asserted-by":"crossref","first-page":"2014","DOI":"10.1093\/cercor\/bhq267","article-title":"Vision of the body modulates somatosensory intracortical inhibition","volume":"21","author":"F Cardini","year":"2011","journal-title":"Cereb Cortex"},{"issue":"1","key":"pone.0270701.ref005","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1016\/j.pain.2008.08.001","article-title":"I can\u2019t find it! 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