title: Duration of spindle bursts during nocturnal sleep in mentally retarded children.
mesh_terms: D001921:Brain / Q000503:physiopathology*; D002648:Child; D002675:Child, Preschool; D002940:Circadian Rhythm; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008607:Intellectual Disability / Q000503:physiopathology*; D008297:Male; D012890:Sleep / Q000502:physiology*