title: [Phasic suppression of muscle tonus during sleep in the course of development (author's transl)].
abstract: A study of phasic suppressions of tonus in 172 sleep recordings of healthy subjects aged from 3 days to 25 years demonstrated that phasic suppressions of tonus may occur from 3 days of age, and that the time when they appear to related neither to the presence of E.E.G. transients nor to the imminence of the onset of paradoxical sleep. the number of sleep recordings showing phasic suppression is very low in youngest infants and increases after the 6th month. The number of phasic suppressions per 100 min. of slow sleep with tonus is fairly stable after 6 years of age, whereas there is an extreme inter-individual variability between 2 and 6 years. These data are interpreted in relation to maturation and development.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004569:Electroencephalography; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D009129:Muscle Tonus; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology
vernacular_title: Suppression phasique du tonus musculaire pendant le sommeil au cours du développement.