Journal Articles CNS Neuroscience & Therapeutics Year : 2024

Does the brain sleep differently depending on intellectual abilities?

Abstract

Aims To compare the children's sleep electroencephalogram according to their intellectual profile. Methods Children were grouped according to their Wechsler Intelligence Scale for Children (WISC) scores (17 with normal intelligence quotient [IQ, NIQ] and 24 with high IQ [HIQ]). Comparisons of spectral power between groups and its relationship with WISC scores were assessed using analyses of variance and linear regression models, adjusted for age and sex. Results Children with HIQ had more rapid eye movement (REM) sleep, especially late at night, and more power in slow‐frequency bands during REM sleep than those with NIQ. There were also positive associations between the processing speed index and the spectral power in β bands in NREM sleep, and with the spectral power in α , σ , β , and γ bands in REM sleep, with different associations between groups. Conclusion The enhanced power in slow bands during REM sleep in children with HIQ overlaps with that of typical REM sleep oscillations thought to be involved in emotional memory consolidation. The dissimilar relationships between spectral power and WISC scores in NIQ and HIQ groups may underlie functional differences in brain activity related to cognitive efficiency, questioning the direction of the relationship between sleep and cognitive functioning.
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hal-04768007 , version 1 (24-01-2025)

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Marine Thieux, Min Zhang, Anne Guignard-Perret, Stéphanie Mazza, Sabine Plancoulaine, et al.. Does the brain sleep differently depending on intellectual abilities?. CNS Neuroscience & Therapeutics, 2024, 30 (2), ⟨10.1111/cns.14378⟩. ⟨hal-04768007⟩
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