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Brain Network Modularity Predicts Exercise-Related Executive Function Gains in Older Adults.

Pauline L Baniqued1,2, Courtney L Gallen1, Michelle W Voss3

  • 1Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA, United States.

Frontiers in Aging Neuroscience
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Brain network modularity predicts cognitive gains from physical exercise interventions in older adults. Higher baseline modularity indicates greater neuroplasticity and responsiveness to interventions enhancing executive function.

Keywords:
brain network modularitycognitive controlexecutive functionexercisefunctional connectivity

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Gerontology

Background:

  • The brain's network organization, characterized by modularity, influences cognitive function.
  • Previous research linked higher brain modularity to improved cognitive training outcomes.
  • The predictive role of modularity in response to physical exercise interventions remains unexplored.

Purpose of the Study:

  • To investigate whether brain network modularity predicts cognitive gains following different 6-month interventions in older adults.
  • To determine if modularity's predictive power extends beyond cognitive training to physical exercise.

Main Methods:

  • Quantified brain network modularity in 128 older adults (mean age 64.74).
  • Participants underwent aerobic exercise (walking), walking plus supplement, stretching/strengthening/stability, or dance interventions.
  • Assessed changes in cardiorespiratory fitness and executive function (reasoning, working memory, task-switching).

Main Results:

  • Aerobic exercise and SSS groups improved cardiorespiratory fitness and executive function.
  • Higher baseline modularity positively correlated with executive function gains in groups showing improvements.
  • No modularity-EF gain relationship observed in the dance group, which did not improve cardiorespiratory fitness or executive function.

Conclusions:

  • Brain network modularity predicts neuroplasticity and cognitive gains from physical exercise interventions in older adults.
  • Modularity's predictive power for cognitive enhancement appears generalizable across diverse interventions.
  • Global network properties like modularity capture individual differences in neuroplasticity, particularly in lower-performing individuals.