Maurizi, C P · Medical hypotheses · 1985 · DOI
This 1985 paper proposes that ME/CFS may be caused by damage to a specific brain region called the dorsal raphe nucleus, potentially triggered by Coxsackie B viruses. The symptoms of ME/CFS match what doctors would expect to see if serotonin levels were too low in this area of the brain. The authors suggest that stress and nutritional deficiencies in tryptophan (a building block for serotonin) may make the condition more likely to develop.
This hypothesis helped establish the concept that ME/CFS may involve specific neurobiological dysfunction rather than being purely psychiatric, which has influenced decades of subsequent neuroscience research. Understanding potential viral triggers and serotonergic mechanisms has implications for both understanding disease pathophysiology and exploring targeted treatment approaches. The focus on occupational clustering among healthcare workers has also informed investigation of environmental and occupational risk factors.
This study presents a theoretical framework rather than experimental evidence, so it does not definitively prove that Coxsackie B virus causes raphe nucleus damage in ME/CFS patients. The paper does not establish whether observed serotonin dysfunction is a primary cause or a secondary consequence of other disease mechanisms. The occupational clustering observation, while intriguing, does not distinguish between viral exposure, stress exposure, and other occupational factors as causative agents.
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 →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
Maurizi, C P (1985). Raphe nucleus encephalopathy (myalgic encephalomyelitis, epidemic neuromyasthenia).. Medical hypotheses. https://doi.org/10.1016/0306-9877(85)90053-2
BibTeX
@article{mecfsatlas-maurizi-1985-raphe-nucleus,
author = {Maurizi, C P},
title = {Raphe nucleus encephalopathy (myalgic encephalomyelitis, epidemic neuromyasthenia).},
journal = {Medical hypotheses},
year = {1985},
doi = {10.1016/0306-9877(85)90053-2},
note = {PubMed: 4010573},
url = {https://www.mecfsatlas.com/evidence/maurizi-1985-raphe-nucleus},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/maurizi-1985-raphe-nucleus
Contribute
Private, reviewed by a human. Not a public comment thread.