Fibromyalgia, chronic fatigue syndrome, and myofascial pain syndrome.
Buskila, D · Current opinion in rheumatology · 2001 · DOI
Quick Summary
This review examined fibromyalgia (FM), chronic fatigue syndrome (CFS), and related pain conditions across different countries. Researchers found that pain sensitivity involves brain chemistry (including a system called NMDA), hormone imbalances, and nervous system problems. CFS was found in about 0.4% of a large community sample, with many children recovering well, though the study notes that no major new treatments were tested during this period.
Why It Matters
This study identifies multiple biological mechanisms potentially involved in ME/CFS and FM, including nervous system dysfunction and hormone imbalances, which helps explain why these conditions cause such severe symptoms. The finding of significant overlap between CFS and FM suggests they may share common physiological pathways, which could inform future treatment development for both conditions.
Observed Findings
Chronic widespread pain prevalence in Israel was comparable to USA, UK, and Canada
About 0.42% prevalence of CFS in a Chicago community sample of 28,673 adults
Ketamine (NMDA antagonist) reduced pain sensitivity in FM patients
Fibromyalgia patients showed increased sympathetic and decreased parasympathetic nervous system activity
Two-thirds of children with CFS recovered and resumed normal activities
Inferred Conclusions
FM and CFS involve dysregulation of multiple biological systems including pain processing, hormones, and autonomic nervous system function
CFS and FM show significant clinical overlap and may share common pathophysiological mechanisms
Autonomic nervous system imbalance is a characteristic feature of FM
HPA axis dysfunction contributes to FM pathophysiology
Remaining Questions
What causes the NMDA system dysfunction in FM and CFS, and can this be targeted therapeutically?
Why do some children recover from CFS while others develop chronic illness?
What This Study Does Not Prove
This review does not establish causation for any of the mechanisms described—it identifies associations and potential contributors. The lack of major therapeutic trials during the study period means this work cannot evaluate treatment effectiveness. The cross-national comparison does not control for diagnostic criteria differences, which may affect prevalence estimates.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
Contribute
Private, reviewed by a human. Not a public comment thread.