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Task switching after stroke. | LitMetric

Task switching after stroke.

Phys Ther

Department of Physical Therapy & Rehabilitation Sciences, University of Kansas Medical Center, Kansas City, KS 66160, USA.

Published: January 2007

AI Article Synopsis

  • This study investigates how task-switching abilities are affected in adults after a stroke, particularly comparing difficulties between tasks relying on internal versus external cues.
  • Participants included 46 stroke survivors and 38 healthy adults, who performed computer-based tasks measuring their ability to switch tasks under different conditions.
  • Results indicated that stroke survivors faced greater challenges with internal task-switching, showing higher error rates, but both groups exhibited improvement over time.

Article Abstract

Background And Purpose: Task switching is a cognitive skill that may be compromised after brain damage. The purposes of this study were to examine task-switching abilities in the subacute phase after stroke, to determine whether a switching task under endogenous or internal control is more difficult than a switching task under exogenous or cued control, and to determine whether deficits in switching attenuate in the first few months after stroke.

Subjects: The participants in this study were 46 adults with stroke and 38 adults without stroke.

Methods: Subjects performed 2 computer-based switching tasks, an alternating task that relied on endogenous control and a cued task that relied on exogenous control. Testing was done in subjects' homes at 1 and 3 months after stroke and at a 2-month interval for control subjects. Switch costs, or the difference between the no-switch condition and the switch condition, were calculated for accuracy and response time.

Results: Subjects in the stroke group had higher switch costs for accuracy than did subjects in the control group. The alternating task was more difficult than the cued task, with higher switch costs for accuracy and response time. The alternating task was particularly difficult for subjects in the stroke group, with high switch costs for accuracy. Both groups showed decreased response time switch costs at the second testing session.

Discussion And Conclusion: Task switching, particularly if under endogenous control, is impaired in adults in the subacute phase after stroke. Clinicians should be aware of performance deficits that may relate to task switching.

Download full-text PDF

Source
http://dx.doi.org/10.2522/ptj.20060093DOI Listing

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