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Aging and changes in phasic events during sleep

A Wauquier1

  • 1Medical College of Ohio, Department of Neurology, Toledo 43699-0008.

Physiology & Behavior
|October 1, 1993
PubMed
Summary
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Sleep patterns change in older adults, with fewer sleep spindles, K-complexes, and rapid eye movements (REM) during REM sleep. These age-related sleep changes may impact cognitive function.

Area of Science:

  • Gerontology
  • Sleep Medicine
  • Neuroscience

Background:

  • Sleep architecture and electroencephalogram (EEG) morphology undergo alterations in the elderly.
  • Phasic events during sleep are influenced by overall sleep structure.

Purpose of the Study:

  • To review changes in sleep phasic events in the elderly.
  • To describe age-related alterations in sleep architecture and EEG morphology.
  • To explore potential correlations between altered sleep events and cognitive function.

Main Methods:

  • Review of existing literature on sleep architecture and phasic events in aging.
  • Analysis of EEG morphology and characteristics of sleep spindles, K-complexes, and REM sleep in older individuals.
  • Consideration of gender differences in REM sleep changes.

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Main Results:

  • A decrease in sleep spindles and K-complexes with age, alongside increased inter-individual variability.
  • Changes in the amplitude, frequency, and distribution of these events.
  • Reduced rapid eye movement (REM) density during REM sleep in older adults, with women exhibiting higher REM density.
  • Potential correlation between altered phasic events and cognitive decline, with physical factors also implicated.

Conclusions:

  • Aging is associated with significant changes in sleep phasic events, including reductions in specific EEG markers.
  • These sleep alterations may have implications for cognitive function in the elderly.
  • Further research is needed to determine if these changes reflect an individual's ability to maintain sleep.