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Related Experiment Videos

Speed of information processing after unilateral stroke.

Marleen J J Gerritsen1, Ina J Berg, Betto G Deelman

  • 1Department of Neuropsychology and Gerontology, University of Groningen, The Netherlands. m.j.j.gerritsen@ppsw.rug.nl

Journal of Clinical and Experimental Neuropsychology
|February 28, 2003
PubMed
Summary

Stroke impacts information processing speed, with right hemisphere stroke patients showing slower reaction times on all tasks compared to controls. Left hemisphere patients were only slower on complex tasks.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Stroke is a leading cause of long-term disability.
  • Information processing speed is crucial for daily functioning after stroke.
  • Hemispheric differences in stroke recovery are not fully understood.

Purpose of the Study:

  • To investigate the impact of unilateral ischemic stroke on information processing speed.
  • To compare the effects of right versus left hemisphere stroke on reaction time.
  • To analyze performance across different task complexities.

Main Methods:

  • Studied 88 first-ever unilateral ischemic stroke patients (42 right, 46 left hemisphere).
  • Included 71 healthy control subjects for comparison.
  • Utilized four reaction time tasks: two visuomotor and two semantic categorization tasks of varying complexity.

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Main Results:

  • Stroke patients exhibited decreased decision-making speed compared to controls.
  • Right hemisphere stroke patients were slower on all tasks than controls.
  • Left hemisphere stroke patients were only slower on complex categorization tasks than controls.

Conclusions:

  • Unilateral ischemic stroke significantly impairs information processing speed.
  • Right hemisphere stroke has a more pervasive effect on reaction time than left hemisphere stroke.
  • Task complexity influences the manifestation of cognitive deficits post-stroke.