Cognitive-motor interference in post-stroke individuals and healthy adults under different cognitive load and task prioritization conditions.
Tetsuya Ohzuno, Shigeru Usuda
PMID 30936641WHAT IT FOUND
When stroke survivors and healthy adults walked while counting backwards, higher counting difficulty and instructions to focus on counting made walking slower and take more steps.
Their counting accuracy did not show the same clear decline.
Key findings
01Walking while counting backwards took more time and more steps than walking alone.
02Harder counting and instructions to focus on counting increased the walking cost, but they did not increase the cognitive cost.
03Stroke patients and healthy adults did not differ clearly in how cognitive load and priority instructions changed walking time and steps.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
Only 26 patients with stroke and 26 healthy adults were studied, and the stroke group was recruited from rehabilitation and aged-care settings. The patients had relatively mild motor and cognitive problems and many were in the chronic phase after stroke, so this may not reflect newly impaired or severely impaired patients. Walking was measured only by Timed Up and Go time and number of steps, not by detailed gait mechanics or fall events. The walking distance was short, so the study may not capture how people manage longer or more complex community walking. It was cross-sectional, so it cannot show that dual-task training improves walking or prevents falls.
Declared interests
The authors declared no conflicts of interest directly relevant to the article.
The easy way to misread this
Do not read this as evidence that dual-task training prevents falls. The study observed performance in a lab; it did not test training, and many patients were chronic and mildly impaired.