title: The association between sleep spindles and IQ in healthy school-age children.
abstract: Recent studies have suggested that sleep is associated with IQ measures in children, but the underlying mechanism remains unknown. An association between sleep spindles and IQ has been found in adults, but only two previous studies have explored this topic in children. The goal of this study was to examine whether sleep spindle frequency, amplitude, duration and/or density were associated with performance on the perceptual reasoning, verbal comprehension, working memory, and processing speed subscales of the Wechsler Intelligence Scale for Children-IV (WISC-IV). We recruited 29 typically developing children 7-11 years of age. We used portable polysomnography to document sleep architecture in the natural home environment and evaluated IQ. We found that lower sleep spindle frequency was associated with better performance on the perceptual reasoning and working memory WISC-IV scales, but that sleep spindle amplitude, duration and density were not associated with performance on the IQ test.
authors.affiliation: Department of Psychiatry, McGill University, Douglas Mental Health University Institute, 6875 LaSalle Boulevard, Verdun, QC H4H 1R3, Canada; Attention, Behavior and Sleep Lab, Douglas Mental Health University Institute, 6875 LaSalle Boulevard, Verdun, QC H4H 1R3, Canada. Electronic address: reut.gruber@douglas.mcgill.ca.
authors.forename: Reut
authors.initials: R
authors.lastname: Gruber
authors.forename: Merrill S
authors.initials: MS
authors.lastname: Wise
authors.forename: Sonia
authors.initials: S
authors.lastname: Frenette
authors.forename: Bärbel
authors.initials: B
authors.lastname: Knäauper
authors.forename: Alice
authors.initials: A
authors.lastname: Boom
authors.forename: Laura
authors.initials: L
authors.lastname: Fontil
authors.forename: Julie
authors.initials: J
authors.lastname: Carrier
mesh_terms: D002648:Child; D005260:Female; D006304:Health Status; D006801:Humans; D007360:Intelligence; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology*; D011153:Population; D012894:Sleep Stages / Q000502:physiology*; D011795:Surveys and Questionnaires / Q000592:standards; D014888:Wechsler Scales / Q000592:standards
keywords: Children; Home polysomnography; IQ; Intelligence; Sleep; Sleep spindle