Natelson, Benjamin H · Frontiers in physiology · 2013 · DOI
This study suggests that ME/CFS is not one single disease but rather multiple conditions with different underlying causes. By grouping patients based on specific characteristics—like whether they have psychiatric diagnoses, fibromyalgia, or blood pressure problems when standing—researchers found that different groups showed different types of brain dysfunction. This approach could help explain why some patients experience trouble with concentration and attention in different ways.
This work challenges the notion of CFS as a monolithic disease and suggests that different patients may have fundamentally different biological problems causing their symptoms. Identifying distinct ME/CFS subgroups could lead to more targeted and effective treatments rather than one-size-fits-all approaches, and may explain why some patients respond to treatments while others do not.
This review does not establish causal links between the proposed phenotypic markers and specific neurological dysfunction—it identifies correlations and proposes mechanisms. The study does not provide new empirical data on cerebral hypoxia in orthostatic intolerant patients, nor does it prove that stratification-based treatment approaches will be clinically superior. It remains unclear whether the proposed subgroups represent truly distinct biological entities or variations along overlapping spectra.
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 →
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