Document Detail

The Effect of Narrowband 500 nm Light on Daytime Sleep in Humans.
MedLine Citation:
PMID:  21281656     Owner:  NLM     Status:  Publisher    
Naps frequently take place during the daytime under some ambient light. People are commonly advised to wear eyeshades, or use black out curtains while sleeping, as light is thought to inhibit sleep. Little is known, however, about how light during daytime sleep may affect the quality or architecture of that sleep. The present within-subjects design administered green narrowband light via light masks to 17 young adults (23.2 ± 4.7 years) during four 90-minute afternoon naps. Subjects were exposed to each of four light conditions that approximate the intensity of 1) physiological darkness (~0 lux), 2) moonlight (~1 lux), 3) typical indoor lighting (~80 lux) and 4) indirect outdoor light (~6,400 lux). All subjects were able to sleep in all lighting conditions, with no differences in sleep quality or architecture. Power analysis revealed sufficient power to detect meaningful differences. Sleep inertia measured upon waking showed a general effect of the nap, independent of condition. Although light has various alerting effects at night, 500 nm LED light presented via light mask does not appear to inhibit daytime sleep. The finding that this light had no effect on the ability of individuals to fall asleep or stay asleep during an afternoon nap may inform decisions regarding the use of the nap as a facilitator of schedule adjustment, and challenges the assumption of light as a barrier to napping.
Elizabeth M Harrison; Michael R Gorman; Sara C Mednick
Related Documents :
10906096 - Effect of alcohol and light on the retinal pigment epithelium of normal subjects and pa...
20927586 - Light effects on mitochondrial photosensitizers in relation to retinal degeneration.
24323206 - Moving target detection in thermal infrared imagery using spatiotemporal information.
23367006 - Torque and power outputs on skilled and unskilled users during manual wheelchair propul...
6835816 - Fractional desynchronization of human circadian rhythms. a method for evaluating entrai...
21806246 - Detecting apoptosis using dynamic light scattering with optical coherence tomography.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-28
Journal Detail:
Title:  Physiology & behavior     Volume:  -     ISSN:  1873-507X     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-2-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2010. Published by Elsevier Inc.
Department of Psychology, University of California, San Diego, 9500 Gilman Dr., 0109, La Jolla, CA 92093, USA; Center for Chronobiology, University of California, San Diego, 9500 Gilman Dr. La Jolla, CA 92093, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Identification of low and high frequency ranges for heart rate variability and blood pressure variab...
Next Document:  Oxysterol binding proteins (OSBPs) and their encoding genes in Arabidopsis and rice.