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• W2483609512 abstract "Recent studies suggest that the temporal relationships between hormone rhythms and sleep are more complex than previously believed. To clarify the situation, an acute shift in the sleep period was used to dissociate sleep from circadian influences. The results demonstrated that hormones from a wide range of endocrine systems, namely the anterior pituitary, hydromineral regulating and pancreatic systems all show temporal associations with sleep. For certain hormones the occurrence of sleep was the major factor determining the 24-hour profile, either being related to sleep as a whole or to the internal sleep structure. Prolactin was influenced by the presence of sleep rather than sleep quality, with an immediate shift in the nocturnal rise as soon as sleep was displaced. A significant pulse was observed at the time of habitual sleep suggesting a possible weak circadian component to the profile which is dominated by the sleep-wake cycle. The profiles of GH and PRA were also determined by sleep, but more precisely by the internal sleep structure. GH showed some association with SWS, particularly with the first SWS episode of both night and day sleep. As for prolactin an “anamnestic” pulse was observed during the night of sleep deprivation, possibly reflecting intrinsic rhythmicity. In contrast to a specific sleep stage, PRA oscillations were associated with sleep stage alternance. The acute shift in sleep confirmed that the increase in nocturnal PRA is sleep related and not circadian in nature. Glucose and insulin oscillations were also amplified during sleep but were not related to the sleep cycles. For other hormones, such as TSH and Cortisol, temporal associations with sleep stages were superimposed on a strong circadian rhythm. Sleep onset had an inhibiting effect on TSH and declining levels of TSH and Cortisol pulses coincided with deep sleep. These temporal associations probably reflect the close proximity of the central controlling mechanisms involved in sleep and hormone secretion. In opposition ANP proved to be independant of sleep and circadian rhythmicity confirming peripheral mechanical regulation. In summary, these results highlight the complexity of hormone and sleep interactions in that no two hormones relate to sleep in exactly the same manner and provide a basis for further research including manipulations of the light-dark cycle." @default.
• W2483609512 created "2016-08-23" @default.
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• W2483609512 date "1993-01-01" @default.
• W2483609512 modified "2023-09-25" @default.
• W2483609512 title "Hormone Rhythms and Sleep" @default.
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• W2483609512 doi "https://doi.org/10.1016/b978-0-08-042279-4.50021-2" @default.
• W2483609512 hasPublicationYear "1993" @default.
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