Wilhelmsen, Ingvard · Scandinavian journal of psychology · 2002 · DOI
This study explores why people with conditions like ME/CFS, fibromyalgia, and functional dyspepsia experience overlapping symptoms such as fatigue, headaches, muscle pain, and sleep problems. The researchers suggest these different conditions may share a common underlying process where the nervous system becomes overly sensitive to pain and discomfort signals, leading the body to experience and report multiple symptoms across different areas.
This study is important for ME/CFS patients because it proposes that the diverse symptoms experienced across multiple body systems may stem from a shared sensitization process rather than separate organ-specific diseases, potentially redirecting research and treatment approaches. For researchers, the framework offers a mechanistic hypothesis connecting peripheral dysfunctions with central sensitization that could inform investigation of ME/CFS pathophysiology.
This review does not establish the primary cause of sensitization or prove that all ME/CFS symptoms result from a single mechanism—it presents a theoretical framework requiring empirical validation. The study does not provide direct neurobiological or molecular evidence of sensitization, nor does it establish whether sensitization is a cause or consequence of functional disorders. Cross-disorder symptom overlap suggests but does not prove a common mechanism.
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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