Phase-shifting effects of bright morning light as treatment for delayed sleep phase syndrome.
Bright morning light may shift sleep timing in delayed sleep phase syndrome
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Abstract
Bright light exposure for 2 hours in the morning may successfully phase advance circadian rhythms in patients with delayed sleep phase syndrome.
- Twenty patients with delayed sleep phase syndrome participated in a controlled treatment study.
- Morning bright light exposure combined with evening light restriction was tested as an intervention.
- Exposure to bright light in the morning was associated with changes in core body temperature rhythms.
- Improvements were also observed in multiple sleep latencies, indicating better sleep timing.
- These findings support the role of light in regulating human circadian rhythms.
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