Document Detail

Acquisition of schedule-induced polydipsia by rats in proximity to upcoming food delivery.
MedLine Citation:
PMID:  15825889     Owner:  NLM     Status:  MEDLINE    
Food-deprived rats that receive intermittent delivery of small amounts of food develop excessive drinking--specifically, schedule-induced polydipsia (SIP). A main characteristic of SIP is its occurrence at the beginning of interfood intervals. The purpose of this study was to demonstrate that SIP can be developed toward the end of interfood intervals, in closer proximity to upcoming than to preceding food delivery. In Experiment 1, two groups were exposed to a fixed-time (FT) 30-sec food schedule with water available during the first or the last 15 sec of each interfood interval. Two additional groups, which had access to water throughout, were exposed to FT 30-sec or FT 15-sec schedules of food presentation. The FT 30-sec group with free access to water developed the highest level of intake; similar and intermediate levels were induced in all the remaining groups. In Experiment 2, three groups of rats were exposed to an FT 90-sec food schedule with water available during the first, the second, or the last 30 sec of each interfood interval. One additional group with access to water throughout was exposed to the FT 90-sec schedule of food presentation. The group with free access to water developed a higher level of consumption than did the other groups, but by the end of training none of the four groups showed statistical differences in polydipsic drinking. Results show that adjunctive drinking can be developed in proximity to upcoming food delivery even with long interfood intervals.
Ginesa López-Crespo; Miguel Rodríguez; Ricardo Pellón; Pilar Flores
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Learning & behavior     Volume:  32     ISSN:  1543-4494     ISO Abbreviation:  Learn Behav     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2005-04-13     Completed Date:  2005-07-08     Revised Date:  2011-01-24    
Medline Journal Info:
Nlm Unique ID:  101155056     Medline TA:  Learn Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  491-9     Citation Subset:  IM    
Departamento de Neurociencia y Ciencias de la Salud, Universidad de Almería, Almería, Spain.
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MeSH Terms
Association Learning*
Drinking Behavior*
Feeding Behavior*
Memory, Short-Term
Rats, Wistar
Reinforcement Schedule*
Retention (Psychology)
Time Perception

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