McCluskey, D R, Riley, M S · Comprehensive therapy · 1992
ME/CFS likely involves multiple different problems happening in the body at the same time, rather than one single cause. Most patients get sick after a viral infection, but scientists haven't found clear evidence the virus stays in the body long-term. People with ME/CFS have real physical limitations in how much exercise they can do, and they may perceive their own effort and tiredness differently than healthy people do.
This perspective helped early ME/CFS research recognize the condition as complex and multifactorial rather than a single disease mechanism. Understanding that various pathways may contribute to ME/CFS has important implications for how patients are studied and treated, and validates that the same diagnosis may look different in different people.
This editorial does not present original experimental data, so it cannot prove causation for any proposed mechanism. It cannot establish whether reduced aerobic capacity is primary or secondary to inactivity, nor can it confirm the role of sleep dysfunction in symptom generation without specific sleep studies. The absence of convincing evidence for persistent infection does not prove infection plays no role in initial disease triggering.
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.