{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,6]],"date-time":"2026-09-06T21:59:11Z","timestamp":1788731951982,"version":"build-2803163510"},"reference-count":47,"publisher":"Wiley","license":[{"start":{"date-parts":[[2018,8,7]],"date-time":"2018-08-07T00:00:00Z","timestamp":1533600000000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"NTNU"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pain Research and Management"],"published-print":{"date-parts":[[2018,8,7]]},"abstract":"<jats:p><jats:italic>Background and Objectives<\/jats:italic>. Cognitive complaints are common in fibromyalgia (FM) and chronic fatigue syndrome (CFS). Fatigue as well as pain may require greater effort to perform cognitive tasks, thereby increasing the load on processing in the central nervous system and interfering with motor control.<jats:italic>Methods<\/jats:italic>. The effect of a concurrent arithmetic cognitive task on postural control during quiet standing was investigated in 75 women (aged 19\u201349 years) and compared between FM, CFS, and matched controls (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><mml:mrow><mml:mi>n<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>25<\/mml:mn><\/mml:mrow><\/mml:math>\/group). Quiet standing on a force plate was performed for 60\u2009s\/condition, with and without a concurrent cognitive task. The center of pressure data was decomposed into a slow component and a fast component representing postural sway and adjusting ankle torque.<jats:italic>Results<\/jats:italic>. Compared to controls, CFS and FM displayed lower frequency in the slow component (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M2\"><mml:mrow><mml:mi>p<\/mml:mi><mml:mo>&lt;<\/mml:mo><mml:mn>0.001<\/mml:mn><\/mml:mrow><\/mml:math>), and CFS displayed greater amplitude in the slow (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M3\"><mml:mrow><mml:mi>p<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.038<\/mml:mn><\/mml:mrow><\/mml:math>and<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M4\"><mml:mrow><mml:mi>p<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.018<\/mml:mn><\/mml:mrow><\/mml:math>) and fast (<mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M5\"><mml:mrow><mml:mi>p<\/mml:mi><mml:mo>=<\/mml:mo><mml:mn>0.045<\/mml:mn><\/mml:mrow><\/mml:math>) components. There were no interactions indicating different responses to the added cognitive task between any of the three groups.<jats:italic>Conclusion<\/jats:italic>. Patients displayed insufficient postural control across both conditions, while the concurrent cognitive task did not perturb quiet standing. Fatigue but not pain correlated with postural control variables.<\/jats:p>","DOI":"10.1155\/2018\/9014232","type":"journal-article","created":{"date-parts":[[2018,8,7]],"date-time":"2018-08-07T19:31:31Z","timestamp":1533670291000},"page":"1-8","source":"Crossref","is-referenced-by-count":7,"title":["A Concurrent Cognitive Task Does Not Perturb Quiet Standing in Fibromyalgia and Chronic Fatigue Syndrome"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2203-1839","authenticated-orcid":true,"given":"Omid","family":"Rasouli","sequence":"first","affiliation":[{"name":"Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway"},{"name":"Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Egil A.","family":"Fors","sequence":"additional","affiliation":[{"name":"Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ottar","family":"Vasseljen","sequence":"additional","affiliation":[{"name":"Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1820-5130","authenticated-orcid":true,"given":"Ann-Katrin","family":"Stensdotter","sequence":"additional","affiliation":[{"name":"Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, 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