Document Detail

Double-pulse experiments with nonphotic and photic phase-shifting stimuli.
MedLine Citation:
PMID:  1773089     Owner:  NLM     Status:  MEDLINE    
Three-hour pulses of novelty-induced wheel running in the early to middle subjective day of golden hamsters produced phase advances of 2-3 hr. This phase shifting could be almost totally abolished by a light pulse following within 3 hr of the exercise pulse. When light pulses occurred about 8 hr after the exercise pulses, the phase-advancing effects of the latter were enhanced. Consideration of the amplitude of the phase response curve (PRC) for light pulses alone, in the test paradigms used here, showed that nonphotic and photic phase shifts did not combine additively. Antagonistic and synergistic interactions between photic and nonphotic shifts may have to be taken into account if it transpires that exercise in people can be used to assist adjustment to new schedules after crossing time zones, or in shiftwork.
N Mrosovsky
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of biological rhythms     Volume:  6     ISSN:  0748-7304     ISO Abbreviation:  J. Biol. Rhythms     Publication Date:  1991  
Date Detail:
Created Date:  1992-02-28     Completed Date:  1992-02-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8700115     Medline TA:  J Biol Rhythms     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  167-79     Citation Subset:  IM    
Department of Zoology, University of Toronto, Ontario, Canada.
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MeSH Terms
Circadian Rhythm / physiology*
Motor Activity / physiology
Photic Stimulation*
Time Factors

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

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