Cognitive Impairments Impact Functional Mobility in Stroke Survivors.
Anjali Tiwari, Stefan Delmas, Sharon N Poisson and 3 others
PMID 41358503WHAT IT FOUND
Stroke survivors with cognitive impairment showed worse balance, walking, and driving than cognitively normal survivors, despite similar motor strength.
Driving performance was the most affected area. Cognitive deficits impact mobility independently of physical weakness, suggesting routine cognitive screening is vital for safe mobility planning.
Key findings
01Cognitively impaired stroke survivors had significantly worse balance, walking, and driving outcomes compared to cognitively normal survivors, even though motor strength and disability levels were similar.
02Driving performance showed the greatest decline in cognitively impaired survivors relative to cognitively normal survivors, with a large effect size (d = 1.12).
03Cognitive severity (measured by DRS-2) correlated with walking and driving composite scores, but not with balance scores.
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
The study was cross-sectional, so it cannot prove that cognitive impairment causes mobility deficits, only that they are associated. The sample consisted of high-functioning stroke survivors who could already walk independently and drive, so results may not generalize to patients with more severe motor or cognitive disabilities. Motor impairment was assessed only via strength and disability scales (mRS), not detailed motor recovery measures like the Fugl-Meyer, so subtle motor differences might have contributed to the results. The sample size was small (40 stroke survivors total), which may inflate effect sizes and limit the ability to detect differences in specific cognitive domains.
Declared interests
The authors declared no conflicts of interest. The study was supported by U.S. Government PHS funding.
The easy way to misread this
Do not interpret the similar motor strength between groups as proof that motor function plays no role in mobility. The study only measured gross strength and disability; it did not assess detailed motor coordination or recovery. The cognitive deficits may interact with unmeasured subtle motor issues to produce the observed mobility declines.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →