Document Detail


Night-shift work in Antarctica: sleep characteristics and bright light treatment.
MedLine Citation:
PMID:  7652039     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Changes in sleep parameters during and after night-shift and the effects of bright white (2500-3000 1x) and dim red (> 500 1x) light treatment on re adaptation after night-shift during winter were studied in 14 men on the British Antarctic Survey Base of Halley (75 degrees south). Subjects kept daily sleep diaries and mood ratings from one week before to three weeks after night-shift and received either full-spectrum white or dim red light treatment from 1100 to 1300 h daily during the first week after night-shift. Plasma melatonin (for 24 h at the end of weeks 1, 2 and 4), and urinary 6-sulfatoxymelatonin (aMT6s, for 48 h weekly) were measured. A significant (MANOVA; p < 0.05) improvement in sleep was seen during night shift (latency and duration) and with bright light treatment (latency). Melatonin and aMT6s rhythms delayed by 7-8 h during night-shift. The white light group readapted slowly, apparently by phase delay, as assessed by aMT6s measurement. The red light group readapted slightly, but significantly (ANOVA, p < 0.01) faster than the white light group.
Authors:
J K Ross; J Arendt; J Horne; W Haston
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Publication Detail:
Type:  Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiology & behavior     Volume:  57     ISSN:  0031-9384     ISO Abbreviation:  Physiol. Behav.     Publication Date:  1995 Jun 
Date Detail:
Created Date:  1995-09-27     Completed Date:  1995-09-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1169-74     Citation Subset:  IM; S    
Affiliation:
British Antarctic Survey Medical Unit, RGIT Survival Centre Ltd., Aberdeen, Scotland, UK.
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MeSH Terms
Descriptor/Qualifier:
Adaptation, Psychological / physiology
Adult
Affect / physiology
Antarctic Regions
Body Temperature / physiology
Humans
Male
Melatonin / analogs & derivatives,  urine
Phototherapy*
Sleep / physiology*
Chemical
Reg. No./Substance:
2208-40-4/6-sulfatoxymelatonin; 73-31-4/Melatonin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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