Document Detail

Changes in spatial memory mediated by experimental variation in food supply do not affect hippocampal anatomy in mountain chickadees (Poecile gambeli).
MedLine Citation:
PMID:  11932955     Owner:  NLM     Status:  MEDLINE    
Earlier reports suggested that seasonal variation in food-caching behavior (caching intensity and cache retrieval accuracy) might correlate with morphological changes in the hippocampal formation, a brain structure thought to play a role in remembering cache locations. We demonstrated that changes in cache retrieval accuracy can also be triggered by experimental variation in food supply: captive mountain chickadees (Poecile gambeli) maintained on limited and unpredictable food supply were more accurate at recovering their caches and performed better on spatial memory tests than birds maintained on ad libitum food. In this study, we investigated whether these two treatment groups also differed in the volume and neuron number of the hippocampal formation. If variation in memory for food caches correlates with hippocampal size, then our birds with enhanced cache recovery and spatial memory performance should have larger hippocampal volumes and total neuron numbers. Contrary to this prediction we found no significant differences in volume or total neuron number of the hippocampal formation between the two treatment groups. Our results therefore indicate that changes in food-caching behavior and spatial memory performance, as mediated by experimental variations in food supply, are not necessarily accompanied by morphological changes in volume or neuron number of the hippocampal formation in fully developed, experienced food-caching birds.
V V Pravosudov; P Lavenex; N S Clayton
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of neurobiology     Volume:  51     ISSN:  0022-3034     ISO Abbreviation:  J. Neurobiol.     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-04-04     Completed Date:  2002-06-18     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0213640     Medline TA:  J Neurobiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  142-8     Citation Subset:  IM    
Copyright Information:
Copyright 2002 Wiley Periodicals, Inc.
Section of Neurobiology, Physiology, and Behavior, University of California-Davis, Davis, CA 95616, USA.
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MeSH Terms
Birds / anatomy & histology*
Feeding Behavior
Food Supply*
Hippocampus / anatomy & histology*,  physiology
Memory* / physiology
Neurons / cytology,  physiology
Spatial Behavior / physiology
Telencephalon / anatomy & histology,  physiology
Grant Support

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