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8 - Neuroendocrinecorrelates of sleep in the elderly

from Part 2 - Neuroendocrine and homeostatic changes in the elderly

Published online by Cambridge University Press:  04 August 2010

By
Theresa M. Buckley
Edited by
S. R. Pandi-Perumal ,
Jaime M. Monti  and
Andrew A. Monjan
S. R. Pandi-Perumal
Affiliation:
Somnogen Inc, New York
Jaime M. Monti
Affiliation:
Universidad de la República, Uruguay
Andrew A. Monjan
Affiliation:
National Institute on Aging, Bethesda, Maryland
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Summary

This chapter discusses the neuroendocrine function changes in the context of the hypothalamic-pituitary-adrenal (HPA) axis, the somatotropin axis, the hypothalamic-gonadal (HPG) axes, and the orexin-hypocretin system. It describes the thyroid axis as well as relationships with prolactin. The chapter links changes in sleep with aging with changes in neuroendocrine systems with aging. Some age-associated changes in HPA axis activity correlate with similarly associated changes in sleep. There is an age-related change in GH secretion. The inverse relationship between Growth hormone-releasing hormone (GHRH) and slow wave sleep (SWS) as well as between corticotropin-releasing hormone (CRH) and GHRH provide the basis for influences of GHRH on sleep in aging. Gonadotropin-releasing hormone (GnRH) is produced and released in the hypothalamus. The hypocretin-orexin system is important for influencing many aspects of sleep-related brainstem nuclei activity. Thyroid-stimulating hormone (TSH) is secreted in a circadian-dependent pattern with peak levels occurring during sleep.
Type
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Information
Principles and Practice of Geriatric Sleep Medicine , pp. 87 - 96
Publisher: Cambridge University Press
Print publication year: 2009

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