Armitage, Roseanne, Landis, Carol, Hoffmann, Robert et al. · Sleep · 2007 · DOI
This study looked at how the brain's sleep patterns differ between people with ME/CFS and their healthy twins. Researchers kept twins awake 4 hours later than usual and then let them sleep normally. They found that people with ME/CFS showed weaker deep sleep activity when recovering from the sleep delay, suggesting their bodies may have trouble responding normally to sleep pressure.
This mechanistic research provides biological evidence that ME/CFS involves dysfunction in the brain's fundamental sleep regulation system, not merely subjective fatigue. Understanding these sleep abnormalities may eventually lead to better diagnostic tools and targeted treatments for the core sleep disturbances reported by many ME/CFS patients.
This study does not prove that abnormal sleep regulation causes ME/CFS or that correcting sleep patterns will resolve the illness. It is also unclear whether these sleep findings are specific to ME/CFS or shared with other conditions. The study demonstrates association and mechanistic dysfunction but not causation or clinical outcome.
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
Armitage, Roseanne, Landis, Carol, Hoffmann, Robert, Lentz, Martha, Watson, Nathaniel F, Goldberg, Jack, et al. (2007). The impact of a 4-hour sleep delay on slow wave activity in twins discordant for chronic fatigue syndrome.. Sleep. https://doi.org/10.1093/sleep/30.5.657
BibTeX
@article{mecfsatlas-armitage-2007-impact-hour,
author = {Armitage, Roseanne and Landis, Carol and Hoffmann, Robert and Lentz, Martha and Watson, Nathaniel F and Goldberg, Jack and Buchwald, Dedra},
title = {The impact of a 4-hour sleep delay on slow wave activity in twins discordant for chronic fatigue syndrome.},
journal = {Sleep},
year = {2007},
doi = {10.1093/sleep/30.5.657},
note = {PubMed: 17552382},
url = {https://www.mecfsatlas.com/evidence/armitage-2007-impact-hour},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/armitage-2007-impact-hour
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