Individual differences in sleep patterns

Davies, D. R.

doi:10.1136/pgmj.52.603.10

Cited by 4 publications

(1 citation statement)

References 10 publications

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“…Furthermore, it remains unknown whether the brain, which develops in synchrony with sleep, is able to capture individual developmental differences in the adolescent population. Although individual variations in sleep patterns have been known for a long time from last century 12 , the exploration of such differences has predominantly relied on behavioural sleep indicators. Notably, studies have illuminated a landscape of sleep phenotypes that varied among the elderly 13 and distinct subtypes among patients with sleep disorders 14, 15 .…”

Section: Introductionmentioning

confidence: 99%

Neural correlates of device-based sleep characteristics in adolescents

Ma,

Sahakian,

Zhang

et al. 2024

Preprint

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Understanding the brain mechanisms underlying objective sleep patterns in adolescents and their implications for psychophysiological development is a complex challenge. Here, we applied sparse canonical correlation (sCCA) analysis on 3300 adolescents from Adolescent Brain Cognitive Development (ABCD) study, integrating extensive device-based sleep characteristics and multimodal imaging data. We revealed two sleep-brain dimensions: one characterized by later being asleep and shorter duration, linked to decreased subcortical-cortical network functional connectivities; the other showed higher heart rate and shorter light sleep duration, associated with lower brain volumes and decreased functional connectivities. Hierarchical clustering based on brain dimension associated with sleep characteristics revealed three biotypes of adolescents, marked by unique sleep profiles: biotype 1 exhibited delayed and shorter sleep, coupled with higher heart rate during sleep; biotype 3 with earlier and longer sleep, accompanied by lower heart rate; and biotype 2 with intermediate pattern. This biotypic differences also extended to cognition, academic attainment, brain structure and function in a gradient order. Longitudinal analysis demonstrated consistent biotypic differences from ages 9 to14, highlighting enduring cognitive and academic advantages in biotype3. The linked sleep-brain dimensions and the associated biotypes were well replicated in a longitudinal sample of 1271 individuals. Collectively, our novel findings delineate a linkage between objective sleep characteristics and developing brain in adolescents, underscoring their significance in cognitive development and academic attainment, which could serve as references for individuals with sleep difficulties and offer insights for optimizing sleep routines to enhance better cognitive development and school achievement.

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Section: Introductionmentioning

confidence: 99%

Neural correlates of device-based sleep characteristics in adolescents

Ma,

Sahakian,

Zhang

et al. 2024

Preprint

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Aspects of personality associated with irregular sleep habits in young adults

Taub¹,

Hawkins²

1979

J. Clin. Psychol.

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Studied psychological correlates of irregularity in chronic sleep routines. The California Psychological Inventory (CPI) and Cornell Medical Index (CMI) were administered to two groups of 18 male university students who were categorized as either irregular sleepers or control Ss. The control group was composed of persons who habitually slept from 12–8:00 A.M. Irregular sleepers were defined as those whose retiring and awakening times continuously varied by about 2 to 4 hours. Control Ss. scored significantly higher than the irregular group on the CPI scales of Do (dominance), Sy (sociability), Sa (self‐acceptance), Sc (self‐control), Ac (achievement via conformance), and Ie (intellectual effeciency), but lower on the Fx (flexibility) scale. There were no significant differences between the groups in scores on the CMI or average sleep length recorded over 2 weeks. The present findings indicate that in young adults, personality functioning is related more closely to the regularity of nocturnal sleep routines than to differences in chronic sleep duration. It is postulated that stable or irregular sleeping patterns are largely dependent factors not only of the psychological characteristics that distinguished the groups, but as yet unspecified constitutional and sociocultural antecedents of the human sleep response.

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