Document Detail


Effects of chronic stress on food intake in rats: influence of stressor intensity and duration of daily exposure.
MedLine Citation:
PMID:  8190805     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of exposure to chronic intermittent stressors of differing intensities [handling, restraint, and immobilization (IMO)] and daily duration (15, 60, and 240 min of IMO) on changes in food intake was studied in adult male rats. Whereas handling did not caused anorexia, restraint slightly reduced food intake and IMO drastically reduced it. The effects were very similar after the 7th and 27th day of exposure to the stressors. Fourteen days of chronic IMO (2 h daily) resulted in decreased food intake as measured on days 1, 10, and 14 of treatment, the inhibition being slightly greater after the first stress session. The circadian rhythm of food intake, expressed as a percent of the total food eaten in a 24 h period, was found to be almost unaffected by chronic IMO, although IMO rats appeared to satiate sooner than control rats. Exposure of rats to chronic IMO (7 days) for 15, 60, and 240 min daily reduced food intake to the same extent in all IMO groups. Taken together, these results suggest that: a) the magnitude of the changes in food intake after chronic exposure to stressors is closely related to their intensity, and b) a severe stressor such as IMO reduces food intake to a certain level that was independent on its daily duration. After repeated exposure to the same stressor, only a slight tendency to recover normal food intake was observed.
Authors:
O Martí; J Martí; A Armario
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiology & behavior     Volume:  55     ISSN:  0031-9384     ISO Abbreviation:  Physiol. Behav.     Publication Date:  1994 Apr 
Date Detail:
Created Date:  1994-06-17     Completed Date:  1994-06-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  747-53     Citation Subset:  IM; S    
Affiliation:
Departament de Biologia Cellular i de Fisiologia, Facultat de Ciències, Universitat Autònoma de Barcelona, Bellaterra, Spain.
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MeSH Terms
Descriptor/Qualifier:
Adrenal Glands / pathology
Animals
Arousal* / physiology
Body Weight / physiology
Circadian Rhythm* / physiology
Feeding Behavior* / physiology
Handling (Psychology)
Male
Motor Activity / physiology
Organ Size / physiology
Rats
Rats, Sprague-Dawley
Restraint, Physical / psychology
Stress, Psychological / complications*

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