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[Non-24-hour sleep-wake syndrome]
1Sapporo Hanazono Hospital.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|March 21, 1998
Summary
Non-24-hour sleep-wake syndrome causes a delayed sleep phase due to a circadian rhythm longer than 24 hours. Vitamin B12 and melatonin show potential for treatment.
Area of Science:
- Chronobiology
- Sleep Medicine
- Neuroscience
Context:
- Non-24-hour sleep-wake syndrome (N24SW) is a circadian rhythm disorder.
- Characterized by a sleep-wake cycle longer than 24 hours, leading to progressive sleep phase delay.
- Similar free-running rhythms observed in healthy individuals under temporal isolation.
Purpose:
- To summarize the characteristics and proposed mechanisms of N24SW.
- To review potential therapeutic interventions for N24SW.
Summary:
- N24SW involves a sleep-wake cycle exceeding 24 hours, causing daily delays in sleep onset and wake times.
- Proposed mechanisms include weak or decreased sensitivity to Zeitgebers (environmental cues) and an intrinsic circadian period longer than 24 hours.
- Vitamin B12 and melatonin have been reported as effective treatments.
Impact:
- Provides a concise overview of N24SW for researchers and clinicians.
- Highlights potential therapeutic avenues for managing this sleep disorder.
- Contributes to understanding circadian rhythm disruptions and their management.