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[Normal children sleep E.E.Gs from 5 months to 3 years old (author's transl)]
Insights
This study details the characteristic electroencephalogram (E.E.G.) patterns in children under three years old during different sleep stages, including drowsiness, calm sleep (C.S.), and paradoxical sleep (P.S.). Findings highlight developmental changes in sleep E.E.G.s for infants and toddlers.
Area of Science:
- Pediatric Neurology
- Sleep Medicine
- Neurodevelopmental Pediatrics
Context:
- Sleep electroencephalogram (E.E.G.) patterns in children under three years old exhibit unique characteristics.
- Developmental changes in sleep architecture are observed from infancy through early childhood.
- Understanding these E.E.G. patterns is crucial for assessing normal neurological development.
Purpose:
- To describe the characteristic electroencephalogram (E.E.G.) findings during drowsiness, calm sleep (C.S.), and paradoxical sleep (P.S.) in children under three years old.
- To document age-related variations in sleep E.E.G. parameters, such as hypersynchrony, vertex sharp waves, sleep spindles, and delta waves.
- To emphasize the importance of polygraphic recordings, including breathing and electro-myogram, for comprehensive sleep analysis in this age group.
Summary:
- Drowsiness E.E.G.s show continuous hypersynchrony in younger children, evolving into bursts in older ones.
- Calm Sleep (C.S.) reveals developing vertex sharp waves and diminishing sleep spindles after 6-8 months, with unique theta rhythms appearing around 21 months.
- Paradoxical Sleep (P.S.) is more readily observed at night and constitutes approximately 20% of total sleep time, characterized by stage I E.E.G. or high-amplitude delta waves.
Impact:
- Provides normative E.E.G. data for sleep in early childhood, aiding in the identification of developmental abnormalities.
- Informs clinical practice regarding the interpretation of sleep studies in infants and toddlers.
- Underscores the necessity of integrating polygraphic data with E.E.G. for a complete understanding of pediatric sleep.
Abstract:
The sleep E.E.G. of the child under 3 years old is characteristic from several points of view: Drowsiness: The hypersynchrony is always observed. It is more continuous in younger children, than in the older one, where only bursts of hypersynchrony are seen. The fast rhythms of low amplitude may exist, during stage 2 sleep, but they are rare. Calm Sleep (C.S.): The vertex humps are more and more acute and sharper from 18 months. The sleep spindles are of high amplitude and frequent at 6 and 8 months. They diminish later. It may be for that reason that III and IV sleep stages seem to be more important after 12 months than before. From 21 months, we have observed an unusual pattern during C.S.: rhythmic and diffuse thêta rhythms of about 6 c/s. Paradoxal sleep (P.S.): If it is possible to observe P.S. during day-naps 8 or 9 months, it is rare later and for recording P.S., it is necessary to record E.E.G.s at night. The E.E.Gs are either a little like stage I E.E.G, or consistent of high and monomorphic delta waves. If it is possible to observe at least 3 complete sleep cycles, the proportion of P.S. is about 20 p. 100 of the total length of the sleep. At least, it is very important, even in medical practice, to record not only E.E.G. but also polygraphic leads: breathing, electro-myogram, electrocardiogram, and to notice also the rapid eyes movements.