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Cyclic alternating pattern in peripubertal children.
Maria Cecilia Lopes1, Agostinho Rosa, Suely Roizenblatt
1Department of Psychobiology, Federal University of Sao Paulo, Brazil. m.cecilialopes@psicobio.epm.br
Sleep
|September 21, 2005
Summary
Cyclic alternating pattern (CAP) events are more frequent in 8-12-year-olds than younger children, with distinct phase patterns observed in boys and girls. This sleep instability metric is associated with EEG arousals.
Area of Science:
- Pediatric Sleep Medicine
- Neurophysiology
- Child Development
Background:
- Cyclic alternating pattern (CAP) and arousals are key indicators of sleep instability and fragmentation in children.
- Understanding these patterns in the peripubertal age group (8-12 years) is crucial for accurate sleep assessment.
Purpose of the Study:
- To determine the expression and characteristics of CAP events in healthy children aged 8-12 years.
- To analyze the association between CAP events and arousals in this age group.
- To provide normative data for CAP in peripubertal children.
Main Methods:
- A descriptive study involving ten healthy, sex-matched children aged 8-12 years.
- Standard polysomnography was conducted following an adaptation night.
- Sleep stages, CAP, and arousals were analyzed using international criteria.
Main Results:
- The mean CAP rate was 62.1% ± 10.8%, significantly higher than in younger children.
- CAP A1 phase was most common (85.5%), with higher A2 and A3 phase prevalence in girls.
- A positive correlation was found between EEG arousals and CAP A2/A3 phases.
Conclusions:
- This study establishes normative CAP data for children aged 8-12 years.
- Age and Tanner stage are important considerations for interpreting CAP in peripubertal children.
- CAP analysis offers valuable insights into sleep instability in this demographic.