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Sleep spindles in children with restless sleep disorder, restless legs syndrome and normal controls

Lourdes M DelRosso1, Maria Paola Mogavero2, Pablo Brockmann3

  • 1Seattle Children's Hospital, Seattle, WA, USA; University of Washington, Seattle, WA, USA.

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|April 19, 2021
PubMed

Insights

Children with restless sleep disorder (RSD) exhibit longer frontal sleep spindles during N2 sleep compared to controls. This finding may explain excessive movement and daytime symptoms in children with RSD.

Area of Science:

  • Neuroscience
  • Sleep Medicine
  • Pediatrics

Background:

  • Restless Sleep Disorder (RSD) is characterized by sleep disturbances and excessive movements.
  • Understanding the neurophysiological underpinnings of RSD is crucial for effective management.
  • Sleep spindles are transient EEG events during non-rapid eye movement sleep, implicated in memory consolidation and sleep maintenance.

Purpose of the Study:

  • To compare sleep spindle characteristics (density, duration, intensity) in children diagnosed with RSD, Restless Legs Syndrome (RLS), and healthy controls.
  • To identify specific sleep spindle alterations associated with RSD.

Main Methods:

  • Polysomnography (PSG) data from 38 children with RSD, 23 with RLS, and 29 controls were analyzed.
  • Sleep spindle activity was quantified from frontal and central electrodes during N2 and N3 sleep stages.
  • Key metrics included spindle density, duration, and intensity.

Main Results:

  • Children with RSD showed significantly longer frontal sleep spindles during N2 sleep compared to controls.
  • Frontal spindle density and intensity demonstrated a trend towards increase in children with RSD.
  • No significant differences in central spindle characteristics were observed between groups.

Conclusions:

  • The prolonged duration of frontal sleep spindles in children with RSD suggests a potential neurophysiological marker.
  • This finding may contribute to explaining the excessive motor activity during sleep and subsequent daytime impairments observed in RSD.
  • Further research into sleep spindle abnormalities in RSD can enhance understanding of its pathophysiology.
Abstract

Keywords:
ChildrenRestless legs syndromeRestless sleep disorderSpindles

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