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free-running disorder

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24 - Sleep and cardiovascular diseases in the elderly
from Part 3 - Sleepdisorders in the elderly
- By Rohit Budhiraja, Stuart F. Quan
Edited by S. R. Pandi-Perumal, Jaime M. Monti, Universidad de la República, Uruguay, Andrew A. Monjan, National Institute on Aging, Bethesda, Maryland
Book:

Principles and Practice of Geriatric Sleep Medicine

Published online:

04 August 2010

Print publication:

26 November 2009, pp 260-270
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Summary

Symptoms of abnormally early sleep are common in the elderly. Aging is associated with earlier habitual bedtimes and earlier morning wake-up times. Intrinsic disorders, are those in which the endogenous circadian regulation of sleep is itself abnormal. These intrinsic disorders include irregular sleep-wake rhythm, free-running disorder, and delayed sleep phase syndrome (DSPS), as well as advanced sleep phase syndrome (ASPS). Amplitudes of other circadian rhythms, including core body temperature, are also reduced with age, and post-mortem brain studies have revealed reductions in suprachiasmatic nucleus (SCN) volume, cell number, and neuropeptide rhythms, suggesting an age-related clock defect. Treatments recommended for ASPS include chronotherapy, timed melatonin administration, and timed light exposure. These treatments are all directed towards the primary goal in treating ASPS: to correct the abnormally early timing of sleep by delaying the circadian clock.

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24 - Sleep and cardiovascular diseases in the elderly

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24 - Sleep and cardiovascular diseases in the elderly

Summary