The association between sleep spindles and IQ in healthy school-age children |
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| Authors: | Reut Gruber Merrill S Wise Sonia Frenette Bärbel Knäauper Alice Boom Laura Fontil Julie Carrier |
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| Institution: | 1. Department of Psychiatry, McGill University, Douglas Mental Health University Institute, 6875 LaSalle Boulevard, Verdun, QC H4H 1R3, Canada;2. Attention, Behavior and Sleep Lab, Douglas Mental Health University Institute, 6875 LaSalle Boulevard, Verdun, QC H4H 1R3, Canada;3. Methodist Healthcare Sleep Disorders Center, Memphis, TN, USA;4. Changed for Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Coeur de Montréal, 5400 Boulevard Gouin Ouest, Montréal, QC H4J 1C5, Canada;5. Department of Psychology, McGill University, 1205 Avenue Docteur Penfield, Montreal, QC H3A 1B1, Canada;6. Département de Psychologie, Université de Montréal, 90 Avenue Vincent d''Indy, Montréal, QC H2V 2S9, Canada |
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| 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. |
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| Keywords: | Sleep spindle IQ Intelligence Children Sleep Home polysomnography |
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