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Noninvasive, High-throughput Determination of Sleep Duration in Rodents
Published on: April 18, 2018
Sleep reactivity and insomnia: genetic and environmental influences
Christopher L Drake1, Naomi P Friedman, Kenneth P Wright
1Henry Ford Hospital, Sleep Disorders and Research Center, Detroit, Michigan 48202, USA. cdrake1@hfhs.org
Sleep
|September 3, 2011
Summary
Sleep reactivity to stress has significant genetic and environmental influences. This suggests sleep reactivity may be a genetic vulnerability for developing insomnia.
Area of Science:
- Behavioral Genetics
- Sleep Medicine
- Psychiatry
Background:
- Insomnia is a prevalent sleep disorder.
- Understanding the etiology of insomnia, including genetic and environmental factors, is crucial for developing effective interventions.
- Sleep reactivity, or an individual's tendency to respond intensely to sleep disruption, is a proposed mechanism linking stress to insomnia.
Purpose of the Study:
- To determine the genetic and environmental contributions to sleep reactivity and insomnia.
- To investigate the relationship between genetic and environmental influences on sleep reactivity and insomnia symptoms.
Main Methods:
- A population-based twin cohort study involving 1782 individuals (744 complete twin pairs).
- Sleep reactivity was assessed using the Ford Insomnia Response to Stress Test (FIRST).
- Insomnia was diagnosed based on self-reported sleep difficulties and their impact on daily functioning.
Main Results:
- Heritability estimates for sleep reactivity were 29% in females and 43% in males.
- Insomnia was 43% to 55% heritable, with no significant sex difference.
- Genetic and environmental variances for sleep reactivity and insomnia were significantly correlated in both sexes.
- Difficulty staying asleep and nonrefreshing sleep showed greater genetic influences compared to difficulty falling asleep.
Conclusions:
- Sleep reactivity to stress has substantial genetic and environmental components.
- Shared genetic influences between sleep reactivity (FIRST scores) and insomnia symptoms support the hypothesis that sleep reactivity is a potential genetic vulnerability for insomnia.
- These findings highlight the complex interplay of genetic and environmental factors in the development of insomnia.
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