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Regular physical activity affects brain activities in old individuals: an observational study.

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Regular physical activity influences electrophysiological brain activity, offering insights into cognitive health. This finding aids physicians in developing therapeutic strategies for dementia patients.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Gerontology

Background:

  • A healthy lifestyle, particularly physical activity, is crucial for preventing cognitive decline and dementia.
  • Understanding how physical activity impacts the brain is vital for patient assessment and treatment strategies.
  • This study investigates the electrophysiological markers of regular physical activity's influence on the brain.

Purpose of the Study:

  • To determine if and how electrophysiological brain activity reflects the effects of regular physical activity.
  • To correlate brain activity changes with cognitive function in patients with dementia.

Main Methods:

  • Retrospective analysis of 327 dementia patients, categorized as 'Active' or 'Nonactive' based on physical activity.
  • Magnetoencephalography (MEG) used to record brain activity, analyzing median frequency, individual alpha frequency, and Shannon's spectral entropy.
  • Cognitive function assessed using the Mini-Mental State Examination (MMSE-J), Frontal Assessment Battery (FAB-J), and Alzheimer's Disease Assessment Scale-Cognitive section (ADAS-J cog).

Main Results:

  • Significant differences in all three spectral parameters (median frequency, individual alpha frequency, Shannon's spectral entropy) were observed between 'Active' and 'Nonactive' groups.
  • The impact of physical activity on brain activity correlated with cognitive improvements, equivalent to 3-11 points in MMSE-J, 3-7 points in FAB-J, and 10-14 points in ADAS-J cog scores.
  • Electrophysiological brain activity was found to reflect both physical activity levels and current cognitive status.

Conclusions:

  • Electrophysiological brain activity serves as a reliable indicator of regular physical activity's influence and a patient's cognitive state.
  • These findings provide valuable insights for clinicians in formulating effective therapeutic interventions and offering guidance for patients with cognitive impairment and dementia.