Buskila, D · Current opinion in rheumatology · 2001 · DOI
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.
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.
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 →
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