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Measuring Neural Mechanisms Underlying Sleep-Dependent Memory Consolidation During Naps in Early Childhood
Published on: October 2, 2019
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Does sleep duration moderate genetic and environmental contributions to cognitive performance?
Tina T Vo1, Shandell Pahlen1, William S Kremen2
1Department of Psychology, University of California, Riverside, Riverside, CA, USA.
Sleep
|June 21, 2022
Summary
Sleep duration influences how genes and environment affect cognition. Shorter sleep enhances genetic impact on semantic fluency and episodic memory, while longer sleep boosts environmental influence.
Area of Science:
- Behavioral Genetics
- Cognitive Neuroscience
- Sleep Science
Background:
- Previous studies link sleep and cognition, but the interplay with genetic and environmental factors remains unclear.
- Understanding how sleep characteristics moderate genetic and environmental influences on cognition is crucial for aging research.
Purpose of the Study:
- To investigate if genetic and environmental contributions to cognitive performance vary based on individual sleep duration.
- To examine sleep duration as a moderator of genetic and environmental influences on four cognitive abilities.
Main Methods:
- Utilized a large twin sample (N=7052) from the Interplay of Genes and Environment across Multiple Studies (IGEMS) consortium.
- Employed quantitative genetic twin models to assess sleep duration's moderating effect on cognitive performance, considering age.
Main Results:
- Genetic and environmental influences on Semantic Fluency and Episodic Memory varied significantly with sleep duration.
- Shorter sleep durations (4 hours) showed higher genetic influence, while longer durations (10 hours) showed higher shared environmental influence on these cognitive functions.
- No significant moderation by sleep duration was found for Spatial-Visual Reasoning or Processing Speed.
Conclusions:
- Sleep duration is a critical factor modulating the genetic and environmental architecture of specific cognitive abilities.
- Findings suggest distinct neurobiological pathways, potentially involving neuroinflammation and beta-amyloid clearance, are influenced by sleep duration and impact cognitive function.
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