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Cited by 7Balance, Gait, and Falls PreventionFibromyalgia and Chronic Fatigue Syndrome ResearchCardiovascular Syncope and Autonomic Disorders

A Concurrent Cognitive Task Does Not Perturb Quiet Standing in Fibromyalgia and Chronic Fatigue Syndrome

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Rasouli, Omid, Fors, Egil A., Vasseljen, Ottar, Stensdotter, Ann-Katrin·2018·Pain Research and Management
DOI 10.1155/2018/9014232PMC PMC6109464
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Abstract

Background and Objectives. 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.Methods. The effect of a concurrent arithmetic cognitive task on postural control during quiet standing was investigated in 75 women (aged 19–49 years) and compared between FM, CFS, and matched controls (n=25/group). Quiet standing on a force plate was performed for 60 s/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.Results. Compared to controls, CFS and FM displayed lower frequency in the slow component (p<0.001), and CFS displayed greater amplitude in the slow (p=0.038andp=0.018) and fast (p=0.045) components. There were no interactions indicating different responses to the added cognitive task between any of the three groups.Conclusion. 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.

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  • Fibromyalgia is a disabling chronic pain syndrome characterized by multiple symptoms, including medically unexplained widespread pain, fatigue, cognitive, mood and sleep disorders.

    “Fibromyalgia (FM) is a disabling chronic pain syndrome characterized by multiple symptoms, including medically unexplained widespread pain, fatigue, cognitive, mood and sleep disorders.1–11”

    From A Review of Movement and Functional Impairments in Fibromyalgia: Implications for Targeted Treatment (2025) · cites this paper as [8]

    The Introduction describes pain, fatigue, and cognitive dysfunction in fibromyalgia, supporting those parts of the symptom list. Our copy does not characterize fibromyalgia as a disabling chronic pain syndrome or describe its pain as medically unexplained and widespread; it also does not identify mood or sleep disorders as symptoms. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

  • Over 80% of FM patients report severe fatigue, which significantly impairs postural control and motor performance.

    “Over 80% of FM patients report severe fatigue, which significantly impairs postural control and motor performance.3,8,21”

    From A Review of Movement and Functional Impairments in Fibromyalgia: Implications for Targeted Treatment (2025) · cites this paper as [8]

    The Conclusion (page unavailable) reports reduced postural control in FM patients and correlations between fatigue and postural control. The Discussion says fatigue may explain the deficits, but does not establish that it significantly impairs motor performance. Our copy does not support the claim that over 80% of FM patients report severe fatigue. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

  • Fatigue, more than pain, is correlated with balance deficits, attributed to impaired sensorimotor learning.

    “Fatigue, more than pain, is correlated with balance deficits, attributed to impaired sensorimotor learning.8”

    From A Review of Movement and Functional Impairments in Fibromyalgia: Implications for Targeted Treatment (2025) · cites this paper as [8]

    The Results (§3.3) report correlations between fatigue and several postural-control measures, but none for pain; the Conclusion likewise suggests fatigue may explain reduced postural control. The Introduction (§1) proposes that pain and fatigue may interfere with sensorimotor learning, but the paper does not establish impaired learning as the cause of the observed balance deficits. Page numbers are unavailable in our copy. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

  • A mismatch between the magnitude and frequency of the controlling ankle torque induces postural sway in patients.

    “A mismatch between the magnitude and frequency of the controlling ankle torque thereby induces postural sway in patients.8”

    From A Review of Movement and Functional Impairments in Fibromyalgia: Implications for Targeted Treatment (2025) · cites this paper as [8]

    The Conclusion proposes that a mismatch between the magnitude and frequency of controlling ankle torque induced greater postural sway in patients with fibromyalgia and chronic fatigue syndrome. The citing sentence presents this proposed explanation as an established causal finding, which the source does not establish. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

  • Reduced attentional and cognitive capacity resulting primarily from fatigue may interfere with sensorimotor processing and contribute to reduced postural control in fibromyalgia patients.

    “Reduced attentional and cognitive capacity resulting primarily from fatigue, may interfere with sensorimotor processing and contribute to reduced postural control displayed by patients with FM.8”

    From A Review of Movement and Functional Impairments in Fibromyalgia: Implications for Targeted Treatment (2025) · cites this paper as [8]

    The Discussion says reduced attentional and cognitive capacity resulting from pain and fatigue may help explain poorer postural control in patients with fibromyalgia and chronic fatigue syndrome. The Conclusion identifies fatigue as an explanatory factor for reduced postural control, but the paper does not establish that fatigue is primarily responsible for reduced cognitive capacity or that this capacity interferes with sensorimotor processing; the Discussion notes that cognitive functioning was not assessed. (LLM, conf=0.83)

    Experimental — accuracy not yet measured

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Authors
Rasouli, O., Fors, E. A., Vasseljen, O., & Stensdotter, A.-K.
Affiliations
Norwegian University of Science and Technology (NO)
Corresponding author
Stensdotter, Ann-Katrin
ORCID
Venue
Pain Research and Management
Publisher
Wiley
Published
2018-08-07
Volume
2018
Pages
1-8
ISSN
  • 1203-6765 (ISSN-L)
  • 1918-1523
DOI
10.1155/2018/9014232
PMC
PMC6109464
OpenAlex
W2885884691
Cited by
7
References
2
Citations by year
2026: 1 · 2025: 3 · 2022: 1 · 2019: 1 · 2018: 1
FWCI
1.19
Type
journal article
Language
en
Open access
Licence
Locations
  • Pain Research and Management (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • BIBSYS Brage (BIBSYS (Norway)) (acceptedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • NORA - Norwegian Open Research Archives (submittedVersion, cc-by)
Funders
NTNU
Topics
  • Health Sciences › Health Professions › Physical Therapy, Sports Therapy and Rehabilitation › Balance, Gait, and Falls Prevention
  • Health Sciences › Medicine › Psychiatry and Mental health › Fibromyalgia and Chronic Fatigue Syndrome Research
  • Health Sciences › Medicine › Surgery › Cardiovascular Syncope and Autonomic Disorders
Keywords
fibromyalgia, chronic fatigue syndrome, postural control, quiet standing, postural sway, center of pressure, ankle torque, fatigue, cognitive complaints
MeSH terms
Adult, Analysis of Variance, Cognition Disorders, Cross-Sectional Studies, Postural Balance, Female, Fibromyalgia, Humans, Male, Mathematics, Middle Aged, Neuropsychological Tests, Pain Measurement, Sensation Disorders, Fatigue Syndrome, Chronic, Case-Control Studies, Young Adult

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