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Cyclic alternating pattern in normal children aged 12 to 24 months

Gabriela Rodrigues Alves1, Agostinho Rosa, Magneide Brito

  • 1Department of Psychobiology, Federal University of São Paulo, São Paulo, SP, Brazil. gabriela@psicobio.epm.br

Arquivos De Neuro-Psiquiatria
|November 5, 2010
PubMed

Insights

Cyclic alternating pattern (CAP) in children aged 12-24 months increases by 2% monthly, reaching 35% by 24 months. This study provides normative data on CAP expression in this age group.

Area of Science:

  • Pediatric Sleep Medicine
  • Neurophysiology
  • Child Development

Background:

  • Cyclic alternating pattern (CAP) is a key indicator of sleep quality and maturity.
  • Limited data exists on CAP expression in infants aged 12-24 months.

Purpose of the Study:

  • To establish normative data for CAP expression in children aged 12-24 months.
  • To characterize the developmental trajectory of CAP in this age group.

Main Methods:

  • A descriptive study involving 12 healthy children (6 girls, 6 boys) aged 12-24 months.
  • Standard polysomnography was conducted in a pediatric sleep laboratory.
  • Sleep stages and CAP were analyzed using international guidelines.

Main Results:

  • The average CAP rate was 25.78 ± 10.18%, showing a linear increase of 2% per month.
  • CAP rate correlated with age (R² = 0.91), from 12% at 12 months to 35% at 24 months.
  • Details on A-phase duration, B-phase duration, CAP cycles, and CAP sequences were recorded.

Conclusions:

  • This study provides essential normative data for CAP in 12-24 month olds.
  • A significant finding is the consistent 2% monthly increase in CAP rate during this developmental period.
  • These findings contribute to understanding sleep maturation in early childhood.
Abstract

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