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Disrupted Sensorimotor Network Integration in Women With Fibromyalgia Revealed by Resting-State Functional MRI.

Gina Rodrigues de Oliveira1,2, Tamires Morett Gama2,3, Lucas Rego Ramos1,2,4

  • 1Postgraduate Program in Anatomical Pathology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil.

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PubMed
Summary

Fibromyalgia patients exhibit reduced functional connectivity in the right sensorimotor network (SMN). This brain alteration correlates with pain intensity, suggesting a neurobiological marker for fibromyalgia.

Keywords:
chronic painfibromyalgiafunctional connectivityresting‐state fMRIsensorimotor network

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Area of Science:

  • Neuroscience
  • Medical Imaging
  • Pain Research

Background:

  • Fibromyalgia (FM) is a chronic condition causing widespread pain and cognitive issues.
  • Altered brain functional connectivity is a suspected mechanism for amplified pain in FM.
  • Resting-state functional magnetic resonance imaging (rs-fMRI) is used to study brain activity.

Purpose of the Study:

  • Investigate brain functional connectivity patterns in FM patients.
  • Utilize rs-fMRI to identify neurobiological differences between FM patients and healthy controls.
  • Explore the relationship between functional connectivity and pain perception in FM.

Main Methods:

  • rs-fMRI data acquired from 33 women with FM and 33 age-matched controls.
  • Independent Component Analysis (ICA) used for image processing and analysis.
  • Statistical comparisons employed FDR correction for multiple comparisons (p < 0.05).

Main Results:

  • FM patients showed significantly reduced functional connectivity in the right sensorimotor network (SMN) compared to controls (p-FDR < 0.05).
  • A negative correlation was found between SMN connectivity and the sensory dimension of pain (McGill Pain Questionnaire; r = -0.35, p = 0.05).

Conclusions:

  • Reduced SMN functional connectivity may serve as a neurobiological marker for FM.
  • Findings suggest FM involves sensorimotor integration and pain modulation dysfunctions.
  • The study supports the role of functional brain alterations in FM pain perception and amplification.