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Effects of Physical Exercise on Working Memory and Prefrontal Cortex Function in Post-Stroke Patients.

M Moriya1,2, C Aoki2, K Sakatani3

  • 1Department of Rehabilitation, Nihon University Itabashi Hospital, Tokyo, Japan.

Advances in Experimental Medicine and Biology
|August 16, 2016
PubMed
Summary

Moderate aerobic exercise boosts brain activity in the prefrontal cortex and enhances working memory in stroke survivors. This study shows physical activity benefits cognitive function post-stroke.

Keywords:
Cognitive functionExerciseNIRSPrefrontal cortexRehabilitation

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Area of Science:

  • Neuroscience
  • Exercise Physiology
  • Rehabilitation Science

Background:

  • Physical exercise is known to improve cognitive functions like working memory in healthy older adults.
  • The impact of exercise on prefrontal cortex activity and working memory in post-stroke patients remains under-investigated.

Purpose of the Study:

  • To investigate the acute effects of moderate-intensity aerobic exercise on prefrontal cortex activity.
  • To assess the impact of physical exercise on working memory performance in individuals post-stroke.

Main Methods:

  • 11 post-stroke patients performed a Sternberg working memory task before and after 15 minutes of moderate aerobic exercise (40% maximal oxygen uptake) on a cycling ergometer.
  • Near-infrared spectroscopy (NIRS) measured prefrontal cortex activity during the task.
  • Behavioral performance (response time, accuracy) was evaluated.

Main Results:

  • Physical exercise significantly improved working memory task performance compared to the control condition (p < 0.01).
  • NIRS data revealed enhanced prefrontal cortex activation post-exercise, particularly in the right hemisphere (p < 0.05).

Conclusions:

  • Moderate-intensity aerobic exercise acutely enhances prefrontal cortex activation during working memory tasks in post-stroke patients.
  • Physical exercise improves working memory performance in this population, suggesting a potential therapeutic benefit for cognitive rehabilitation.