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The effects of diazepam on sleep depend on the photoperiod.

Acta Pharmacol Sin

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Laboratory for Neurophysiology, Department of Cell and Chemical Biology, Leiden University, Medical Centre, Leiden, 2333, ZC, The Netherlands.

Daylength (i.e., photoperiod) provides essential information for seasonal adaptations of organisms.

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Circadian rhythm mechanisms underlying convergent adaptation of unihemispheric slow-wave sleep in marine mammals.

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Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong 511458, China.

Marine mammals have evolved unihemispheric slow wave sleep (USWS), a unique state during which one cerebral hemisphere sleeps while the other remains awake, to mitigate the fundamental conflict between sleep and wakefulness. However, the underlying mechanisms remain largely unclear. Here, we use a comparative phylogenetic approach to analyze genes associated with light-dependent circadian mechanisms, aiming to reconstruct the evolution of the circadian rhythm pathway in mammals and to identify adaptively changed components likely to have contributed to the development of USWS.

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Temperature-dependent sleep patterns in Drosophila.

J Therm Biol

December 2024

Institute of Zoology, Slovak Academy of Sciences, Dúbravská cesta 9, 845 06 Bratislava, Slovakia. Electronic address:

Sleep is a fundamental physiological process conserved through evolution, from worms to humans. Understanding how temperature influences sleep is essential for comprehending the complexities of animal behavior, physiology, and their adaptations to thermal environments. This study explores the impact of temperature on sleep behavior and patterns in Drosophila melanogaster.

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Organisms may simultaneously face thermal, desiccation and nutritional stress under climate change. Understanding the effects arising from the interactions among these stressors is relevant for predicting organisms' responses to climate change and for developing effective conservation strategies. Using both dynamic and static protocols, we assessed for the first time how sublethal desiccation exposure (at 16.

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Background: Two phenotypes of insomnia disorder (ID) have been identified based on objective total sleep duration (TST): one with short sleep duration (ISSD) and another with normal sleep duration (INSD). Recent proposals suggested that insomnia with objective short-sleep duration (TST < 7 h) is associated with impaired inhibitory function, leading to a dysregulation of cortical inhibition, which may underlie its prevalence. This study investigated the status of impaired response inhibition in these two phenotypes and examined the potential different effect of response inhibition training on these two phenotypes.

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