Multiple voxel pattern analysis shows associations between chronic fatigue syndrome and cortical atrophy.
Wu, Kang, Zou, Yihuai, Li, Yuanyuan et al. · Frontiers in neuroscience · 2025 · DOI
Quick Summary
Researchers used specialized brain imaging to compare 37 people with ME/CFS to 34 healthy people and found that certain areas of the brain's outer layer are thinner in patients with ME/CFS. These thinner areas were linked to how severe their fatigue, pain, and reduced quality of life were. The study suggests that ME/CFS may involve physical changes in brain structure that could help explain why patients experience such debilitating fatigue.
Why It Matters
This study provides neuroimaging evidence of structural brain changes in ME/CFS, which could help establish the biological basis of the disease and support clinical diagnosis. Understanding which brain regions are affected and how their structural changes relate to symptom severity advances the field's ability to objectively measure disease pathology.
Observed Findings
Five brain regions (paracentral, precentral, central, intraparietal, and superior temporal cortices) were identified as relevant to ME/CFS using MVPA classification.
Cortical thickness in these regions was reduced in CFS patients compared to healthy controls.
Thinner cortex in these areas correlated with greater fatigue severity in CFS patients.
Thinner cortex in these areas correlated with lower quality of life and health status in CFS patients.
Thinner cortex in these areas associated with higher pain levels among study participants.
Inferred Conclusions
Cortical atrophy in specific brain regions is associated with ME/CFS and may contribute to understanding the disease's pathophysiology.
Structural brain changes correlate with multiple symptom domains (fatigue, pain, functional impairment), suggesting a unified neurobiological basis.
Structural MRI analysis may have diagnostic potential for ME/CFS, though further validation is needed.
Remaining Questions
Do these cortical changes develop as a result of prolonged ME/CFS illness, or do they precede disease onset?
How do these structural alterations relate to the functional brain network abnormalities reported in other CFS studies?
What This Study Does Not Prove
This study does not prove that cortical atrophy causes ME/CFS symptoms—it only shows an association. The cross-sectional design cannot establish whether brain changes develop as a result of the disease, precede it, or occur simultaneously. The 70% classifier accuracy, while meaningful, indicates this is not yet a reliable diagnostic tool on its own.
Tags
Symptom:Cognitive DysfunctionPainFatigue
Biomarker:Neuroimaging
Method Flag:Weak Case DefinitionSmall SampleExploratory Only