Behan, P O, Behan, W M · Critical reviews in neurobiology · 1988
This review examines ME/CFS, a condition that causes severe exhaustion, muscle pain, and cognitive difficulties, sometimes appearing in outbreaks and sometimes in individual cases. Researchers note that patients often experience emotional changes, memory problems, and depression alongside the physical symptoms. The authors suggest that a lingering viral infection may trigger a metabolic problem in the body, which could explain why people feel so severely fatigued.
This review helped establish the conceptual framework linking ME/CFS to viral triggers and metabolic abnormalities, moving understanding beyond purely psychiatric models. For patients, recognizing that symptoms have a physiological basis—rather than being purely psychological—has been important for validation and appropriate medical investigation. This work contributed to shifting medical and research attention toward investigating viral persistence and metabolic dysfunction as central mechanisms.
This review does not identify the specific virus or viruses responsible, nor does it establish the precise metabolic pathways involved. The authors propose an association between viral infection and metabolic disorder, but the review cannot prove causation or distinguish between direct viral effects, immune dysregulation, or other secondary consequences. Additionally, the psychiatric symptoms described may reflect both primary neurobiological effects and the psychological impact of living with severe chronic illness.
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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