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Association of sleep spindle activity and sleepiness in children with sleep-disordered breathing

Pablo E Brockmann1,2, Raffaele Ferri3, Oliviero Bruni4

  • 1Department of Pediatric Cardiology and Pulmonology, Division of Pediatrics, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.

Journal of Clinical Sleep Medicine : JCSM : Official Publication of the American Academy of Sleep Medicine
|February 6, 2020
PubMed

Insights

Children with sleep-disordered breathing (SDB) and daytime sleepiness have reduced sleep spindle activity. This finding suggests a link between sleep microstructure and sleepiness in pediatric SDB.

Area of Science:

  • Pediatric Sleep Medicine
  • Neurophysiology
  • Sleep Research

Background:

  • Daytime sleepiness is commonly associated with snoring and sleep-disordered breathing (SDB).
  • The precise mechanisms linking SDB, sleep microstructure, and daytime sleepiness are not fully understood.
  • Sleep spindles, a key feature of sleep microstructure, are thought to play a role in sleep's restorative functions.

Purpose of the Study:

  • To investigate the association between daytime sleepiness and sleep spindle activity in children with SDB.
  • To compare sleep spindle characteristics in children with SDB who experience daytime sleepiness versus those who do not.

Main Methods:

  • A cohort of children diagnosed with SDB was studied.
  • Participants were divided into two groups: those reporting daytime sleepiness and age/sex-matched controls without daytime sleepiness.
  • Polysomnography data were analyzed to quantify sleep spindle activity, particularly during N2 sleep stage.

Main Results:

  • The study included 33 children with SDB (mean age 7.5 years).
  • Children with SDB and daytime sleepiness exhibited significantly lower sleep spindle activity compared to those without sleepiness.
  • Specifically, median sleep spindle index in N2 sleep was lower in the sleepiness group (77.5) versus the control group (116.9).

Conclusions:

  • Sleep spindle activity is significantly reduced in children with SDB accompanied by daytime sleepiness.
  • The exact mechanisms underlying this association require further investigation.
  • Future research should explore the specific role of sleep spindle activity in the manifestation of daytime symptoms in pediatric SDB.
Abstract

Keywords:
hypersomniapediatricsleep microstructuresleep spindlessleepiness

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