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Article: Delayed and advanced sleep phase symptoms
- Article from:
- The Israel Journal of Psychiatry and Related Sciences
- Article date:
- January 1, 2002
- Author:
CopyrightCopyright Gefen Publishing House Ltd. 2002. Provided by ProQuest LLC. (Hide copyright information)
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Abstract: Current criteria for circadian rhythm sleep disorders require a mismatch between the endogenous circadian sleep tendency and exogenous environmental requirements for sleep timing. To examine the prevalence of circadian rhythm sleep disorders by DSM-IV criteria, sleep complaints and objectively-measured sleep timing were sampled in a population aged 40-64 years. Randomly selected volunteers were interviewed concerning sleep complaints. Then, objective sleep timing was estimated from wrist activity recordings and environmental illumination data. In this age group, advance-related complaints (trouble staying awake until bedtime and troubled by waking up early in the morning) were ...