Abstract
The onset of melatonin secretion under dim light conditions (DLMO) and the circadian temperature rhythm during a constant routine were assessed in 6 female controls and 6 female patients with winter depression (seasonal affective disorder, SAD) before and after bright light treatment. After sleep was standardized for 6 days, the subjects were sleep‐deprived and at bedrest for 27 h while core temperature and evening melatonin levels were determined. The DLMO of the SAD patients was phase‐delayed compared with controls (2310 vs 2138); with bright light treatment, the DLMO advanced (2310 to 2135). The minimum of the fitted rectal temperature rhythm was phase‐delayed in the SAD group compared with the controls (0542 vs 0316); with bright light treatment, the minimum advanced (0542 vs 0336).
Original language | English (US) |
---|---|
Pages (from-to) | 60-66 |
Number of pages | 7 |
Journal | Acta Psychiatrica Scandinavica |
Volume | 88 |
Issue number | 1 |
DOIs | |
State | Published - Jul 1993 |
Externally published | Yes |
Keywords
- circadian rhythm
- light therapy
- melatonin
- seasonal affective disorder
ASJC Scopus subject areas
- Psychiatry and Mental health