Shan, Zack Y, Kwiatek, Richard, Burnet, Richard et al. · NMR in biomedicine · 2017 · DOI
This study found that ME/CFS patients with the worst sleep quality had specific structural differences in a brain region called the medial prefrontal cortex compared to healthy people. The researchers used MRI brain scans to measure brain tissue and found that the brain tissue in this area appeared different in ME/CFS patients, especially those reporting unrefreshing sleep. This is important because it provides biological evidence that unrefreshing sleep in ME/CFS is a real physical problem, not just a patient's perception.
Unrefreshing sleep is one of the most debilitating symptoms of ME/CFS, and patients are often dismissed as misperceiving their sleep quality or exaggerating their fatigue. This study provides objective neuroimaging evidence that unrefreshing sleep correlates with measurable brain structural differences, validating the symptom as biologically real and deserving of clinical attention and further investigation.
This study demonstrates correlation between mPFC structural differences and sleep quality, but does not establish causation—we cannot determine whether brain changes cause poor sleep or whether poor sleep causes brain changes. The small sample size and case-control design limit generalizability. The study does not identify what causes these structural differences or propose specific treatments.
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
Shan, Zack Y, Kwiatek, Richard, Burnet, Richard, Del Fante, Peter, Staines, Donald R, Marshall-Gradisnik, Sonya M, et al. (2017). Medial prefrontal cortex deficits correlate with unrefreshing sleep in patients with chronic fatigue syndrome.. NMR in biomedicine. https://doi.org/10.1002/nbm.3757
BibTeX
@article{mecfsatlas-shan-2017-medial-prefrontal,
author = {Shan, Zack Y and Kwiatek, Richard and Burnet, Richard and Del Fante, Peter and Staines, Donald R and Marshall-Gradisnik, Sonya M and Barnden, Leighton R},
title = {Medial prefrontal cortex deficits correlate with unrefreshing sleep in patients with chronic fatigue syndrome.},
journal = {NMR in biomedicine},
year = {2017},
doi = {10.1002/nbm.3757},
note = {PubMed: 28661067},
url = {https://www.mecfsatlas.com/evidence/shan-2017-medial-prefrontal},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-27. https://www.mecfsatlas.com/evidence/shan-2017-medial-prefrontal
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