Mechanisms of Post-Stroke Fatigue: A Follow-Up From the Third Stroke Recovery and Rehabilitation Roundtable.
Annapoorna Kuppuswamy, Sandra Billinger, Kirsten G Coupland and 8 others
PMID 38156702WHAT IT FOUND
Post-stroke fatigue likely has distinct subtypes with different biological drivers, meaning a single treatment rarely works for everyone.
Inflammation, dopamine pathways, and sensory network dysfunction are key suspects, but current evidence is too limited to recommend specific interventions beyond general exercise and careful assessment.
Key findings
01Fatigue experiences vary widely between patients, suggesting distinct subtypes rather than a single uniform disorder.
02Current evidence links fatigue to inflammation, dopamine signaling, and sensory network dysfunction, but no single mechanism explains all cases.
03Exercise and certain medications show promise but results are inconsistent, often due to small sample sizes and lack of standardized measurement.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
This is a review, not a clinical trial, so it offers hypotheses rather than proven treatments. The evidence base for mechanisms is drawn from small, inconsistent studies with varying definitions of fatigue. The authors note that current measurement tools often fail to distinguish between physical, cognitive, and emotional fatigue, making it hard to identify specific subtypes in practice. Interventions discussed (like modafinil or exercise) have mixed results, and the review does not provide clear guidelines on which patients will respond to which treatment.
Declared interests
The authors declared no potential conflicts of interest. Funding was provided by the Wellcome Trust, Canadian Partnership for Stroke Recovery, and NHMRC Center of Research Excellence.
The easy way to misread this
Do not interpret this paper as evidence that a specific treatment like modafinil or a particular exercise program works for all stroke survivors with fatigue. The paper highlights that fatigue is likely a heterogeneous condition with multiple subtypes, and current evidence is insufficient to recommend a one-size-fits-all intervention.