Washington, Stuart D, Rayhan, Rakib U, Garner, Richard et al. · Brain communications · 2020 · DOI
This study used brain imaging to compare how the brains of people with ME/CFS and Gulf War Illness respond to exercise during a memory task. Researchers found that exercise affected brain activity differently in the two conditions—specifically in areas related to pain awareness, attention, and threat detection. These differences suggest that ME/CFS and Gulf War Illness may involve distinct biological mechanisms, which could help doctors distinguish between them.
Post-exertional malaise is a hallmark symptom of ME/CFS, yet it also occurs in Gulf War Illness, creating diagnostic confusion. This study identifies objective neurobiological differences that could enable clinicians to distinguish these conditions based on brain responses to exercise, potentially improving diagnosis and tailoring treatment strategies accordingly.
This study does not establish causation—only that different brain activation patterns associate with the two conditions post-exercise. It does not prove these neural differences cause post-exertional malaise or are sufficient for diagnosis in isolation. Results are from a small, cross-sectional sample and require replication in larger, longitudinal cohorts before clinical application.
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
Washington, Stuart D, Rayhan, Rakib U, Garner, Richard, Provenzano, Destie, Zajur, Kristina, Addiego, Florencia Martinez, et al. (2020). Exercise alters brain activation in Gulf War Illness and Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.. Brain communications. https://doi.org/10.1093/braincomms/fcaa070
BibTeX
@article{mecfsatlas-washington-2020-exercise-alters,
author = {Washington, Stuart D and Rayhan, Rakib U and Garner, Richard and Provenzano, Destie and Zajur, Kristina and Addiego, Florencia Martinez and VanMeter, John W and Baraniuk, James N},
title = {Exercise alters brain activation in Gulf War Illness and Myalgic Encephalomyelitis/Chronic Fatigue Syndrome.},
journal = {Brain communications},
year = {2020},
doi = {10.1093/braincomms/fcaa070},
note = {PubMed: 32954325},
url = {https://www.mecfsatlas.com/evidence/washington-2020-exercise-alters},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-26. https://www.mecfsatlas.com/evidence/washington-2020-exercise-alters
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