Document Detail

Diurnal rhythm disorder of behavioral activity in SAMP1 mice is partially normalized by spontaneous wheel running.
MedLine Citation:
PMID:  14637216     Owner:  NLM     Status:  MEDLINE    
We examined the diurnal rhythms of food and water intake, spontaneous wheel running (SWR), and spontaneous motor activity (SMA) in the SAMP1 strain, a mouse model of accelerated senescence. Without SWR exercise, food, and water intake in the SAMP1 mice was significantly higher during the light (L)-phase of the light-darkness (LD) cycle than in the control SAMR1 strain. Additionally, SWR and SMA activity rhythms were split in SAMP1 mice, as demonstrated by the appearance of a secondary peak starting from the end of the dark (D)-phase. SWR exercise significantly increased the percentages of nocturnal food and water intake and SMA in the SAMP1 mice, although food and water intake did not reach the level of control SAMR1 mice. Thus, the disordered diurnal rhythms in SAMP1 mice can be normalized, even if only partially, by SWR exercise.
Yasunori Yanagidaira; Keiichi Higuchi; Hiroshi Nose
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiology & behavior     Volume:  80     ISSN:  0031-9384     ISO Abbreviation:  Physiol. Behav.     Publication Date:  2003 Nov 
Date Detail:
Created Date:  2003-11-25     Completed Date:  2004-01-26     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  195-201     Citation Subset:  IM    
Department of Sports Medical Science, Institute on Aging and Adaptation, Shinshu University Graduate School of Medicine, Matsumoto 390-8621, Japan.
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MeSH Terms
Analysis of Variance
Chronobiology Disorders / physiopathology*,  rehabilitation*
Mice, Inbred Strains
Mice, Mutant Strains / genetics
Models, Animal
Motor Activity
Physical Conditioning, Animal*
Time Factors

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