Attentional demands for static postural control after stroke
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Updated: Sep 28, 2026
Computerized Dynamic Posturography for Postural Control Assessment in Patients with Intermittent Claudication
Published on: December 11, 2013
Lesley A Brown1, Ryan J Sleik, Toni R Winder
1Balance Research Laboratory, Department of Kinesiology, University of Lethbridge, Lethbridge, Alb, Canada. l.brown@uleth.ca
Objective:
To assess the attentional demands associated with postural control among people who have had a stroke.
Design:
Nonrandomized matched case-control study.
Setting:
University research laboratory in Canada.
Participants:
Six individuals who had suffered a left or right cerebral ischemic attack in the past year and a sample of 6 age- and gender-matched controls. Participants in the stroke group had a mean age of 64.17+/-13.14 years; control participants had a mean age of 64.00+/-13.91 years. Mean National Institute of Health Stroke Scale scores for these patients were 7.67+/-4.92 at the time of stroke and 1.66+/-1.36 at the time of testing. None of the patients were taking medications that would alter cognitive status or balance abilities.
Intervention:
Participants performed a verbal reaction-time test while engaged in 3 postural tasks (sitting, standing, standing with feet together).
Main Outcome Measure:
Reaction time: latency between visual stimulus and verbal response.
Results:
Reaction times in the stroke group differed significantly in all conditions from the controls (410+/-72 ms vs 320+/-54 ms, P<.01). A significant interaction was found between group and postural task (P=.05), with reaction-time scores showing a progressive increase in postural task difficulty among participants who had suffered a stroke. Post hoc comparisons revealed that sitting reaction-time scores were significantly slower than reaction-time scores for feet together standing (P=.008) among participants in the stroke group.
Conclusion:
Individuals who have suffered a stroke showed increased attentional demands for tasks of static postural control compared with healthy, age-matched participants.
