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The aging brain: sleep, the circadian clock and exercise.

M Panagiotou1, S Michel1, J H Meijer1

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Aging impacts the brain, sleep, and circadian rhythms in humans and rodents. Moderate exercise can improve these aging-related changes, promoting healthy aging and longevity.

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Area of Science:

  • Neuroscience
  • Gerontology
  • Chronobiology

Background:

  • Aging involves damage accumulation and reduced repair mechanisms, impacting lifespan.
  • The aging brain undergoes morphological and functional changes affecting sleep and circadian rhythms.
  • Both human and rodent models exhibit aging-related alterations, with species-specific differences.

Purpose of the Study:

  • To review age-related changes in the brain, sleep, and circadian clock in humans and rodents.
  • To identify and compare species-specific differences in aging brain alterations.
  • To suggest standardized analytical approaches for comparing research findings.

Main Methods:

  • Review of scientific literature on aging, brain function, sleep, and circadian rhythms.
  • Comparative analysis of human and rodent aging models.
  • Discussion of analytical challenges and recommendations for uniform methodologies.

Main Results:

  • Aging affects brain structure and function, disrupting sleep and circadian timing.
  • Identified species-specific differences in aging brain alterations between humans and rodents.
  • Physical exercise, even moderate, ameliorates aging characteristics in sleep and circadian rhythms across species.

Conclusions:

  • Aging-induced brain changes significantly impact sleep and circadian regulation.
  • Standardized research methods are crucial for reliable cross-species comparisons.
  • Physical exercise is a potent intervention for mitigating age-related decline in sleep and circadian function, supporting healthy aging and longevity.