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Author  |
Boivin, D.B.; Boudreau, P.; James, F.O.; Kin, N.M.K.N.Y. |
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Title |
Photic resetting in night-shift work: impact on nurses' sleep |
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Journal Article |
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Year |
2012 |
Publication |
Chronobiology International |
Abbreviated Journal |
Chronobiol Int |
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Volume |
29 |
Issue |
5 |
Pages |
619-628 |
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Keywords |
Adaptation, Physiological; Adult; *Circadian Rhythm; *Darkness; Female; Humans; *Light; Male; Melatonin/metabolism; Middle Aged; *Nurses; Sleep/*physiology; Work Schedule Tolerance/*physiology |
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Abstract |
The objective of this study was to quantify daytime sleep in night-shift workers with and without an intervention designed to recover the normal relationship between the endogenous circadian pacemaker and the sleep/wake cycle. Workers of the treatment group received intermittent exposure to full-spectrum bright light during night shifts and wore dark goggles during the morning commute home. All workers maintained stable 8-h daytime sleep/darkness schedules. The authors found that workers of the treatment group had daytime sleep episodes that lasted 7.1 +/- .1 h (mean +/- SEM) versus 6.6 +/- .2 h for workers in the control group (p = .04). The increase in total sleep time co-occurred with a larger proportion of the melatonin secretory episode during daytime sleep in workers of the treatment group. The results of this study showed reestablishment of a phase angle that is comparable to that observed on a day-oriented schedule favors longer daytime sleep episodes in night-shift workers. (Author correspondence: diane.boivin@douglas.mcgill.ca ). |
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Address |
Centre for Study and Treatment of Circadian Rhythms, Douglas Mental Health University Institute, Department of Psychiatry, McGill University, Montreal, Quebec, Canada. diane.boivin@douglas.mcgill.ca |
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English |
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ISSN |
0742-0528 |
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Notes |
PMID:22621359 |
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no |
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Call Number |
IDA @ john @ |
Serial |
144 |
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