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Working memory network plasticity after exercise intervention detected by task and resting-state functional MRI.

Lina Zhu1, Xuan Xiong1, Xiaoxiao Dong1

  • 1College of Physical Education, Yangzhou University, Yangzhou, Jiangsu, China.

Journal of Sports Sciences
|February 25, 2021
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Summary

An 11-week exercise program significantly improved working memory (WM) in deaf children. These cognitive gains were linked to brain plasticity changes in the hippocampus and its connections, suggesting exercise benefits brain function.

Keywords:
Working memorydeaf childrenexercise interventionfunctional MRIneural network plasticity

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Area of Science:

  • Neuroscience
  • Exercise Science
  • Developmental Psychology

Background:

  • Working memory (WM) is crucial for cognitive function.
  • Deaf children may face unique challenges in cognitive development.
  • Exercise is increasingly recognized for its positive impact on brain health.

Purpose of the Study:

  • To investigate the effects of an 11-week exercise intervention on working memory (WM) performance in deaf children.
  • To examine changes in brain activity and functional network connectivity during a WM task and at rest.
  • To explore the relationship between exercise-induced cognitive improvements and neural plasticity.

Main Methods:

  • Twenty-six deaf children were randomly assigned to an exercise intervention or control group.
  • Functional magnetic resonance imaging (fMRI) was used to assess brain activity and resting-state functional connectivity (Rs-FC) before and after the intervention.
  • Participants completed a working memory (N-back) task during fMRI scans.

Main Results:

  • The exercise group showed significant improvements in WM performance compared to the control group.
  • Exercise intervention led to increased brain activation in parietal, occipital, and temporal regions, including the hippocampus.
  • Enhanced WM performance correlated with greater activation in the left hippocampus and altered connectivity between the hippocampus and the middle frontal gyrus.

Conclusions:

  • Exercise interventions can effectively enhance working memory in deaf children.
  • Improvements in WM may be mediated by exercise-induced neuroplasticity within the working memory network.
  • These findings highlight the potential of physical activity to support cognitive development in pediatric populations with hearing impairments.