Changes in spatial memory mediated by experimental variation in food supply do not affect hippocampal anatomy in mountain chickadees (Poecile gambeli)

Détails

ID Serval
serval:BIB_4AB6611103F0
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Changes in spatial memory mediated by experimental variation in food supply do not affect hippocampal anatomy in mountain chickadees (Poecile gambeli)
Périodique
Journal of Neurobiology
Auteur(s)
Pravosudov V.V., Lavenex P., Clayton N.S.
ISSN
0022-3034 (Print)
1097-4695 (Electronic)
ISSN-L
0022-3034
Statut éditorial
Publié
Date de publication
2002
Peer-reviewed
Oui
Volume
51
Numéro
2
Pages
142-148
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, P.H.S. Publication Status: ppublish
Résumé
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.
Mots-clé
Animals, Birds/anatomy & histology, Feeding Behavior, Food, Food Supply, Hippocampus/anatomy & histology, Hippocampus/physiology, Memory/physiology, Neurons/cytology, Neurons/physiology, Spatial Behavior/physiology, Telencephalon/anatomy & histology, Telencephalon/physiology
Pubmed
Création de la notice
13/10/2014 18:54
Dernière modification de la notice
20/08/2019 14:58
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