Dissociation of conditioned and unconditioned factors in the running-induced feeding suppression.

Full Abstract

In adult rats, running wheel introduction induces a 7 to 10 day feeding suppression, either due to a learned conditioned taste avoidance or to the direct unconditioned effects of wheel running. The three experiments investigated the effects of wheel introduction on familiar (rat chow) and novel (24% sucrose solution) food consumption (Experiment 1), and then explored how alternate-day wheel access affected sucrose consumption when it was novel (Experiment 2) or familiar (Experiment 3). When paired with wheel introduction the consumption of a novel sucrose solution was completely suppressed for an extended period, whether the rats had continuous or alternate-day wheel access. In contrast, familiar food consumption was suppressed, for a limited period, only on wheel days. When rats were pre-exposed to the sucrose, consumption was suppressed only on wheel days. The results suggest that in addition to the direct unconditioned effects of wheel running on feeding, learning factors may influence the feeding suppression observed and thus wheel introduction supports a learned conditioned taste avoidance.

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Author information

Author/s: Satvat, Elham (E); Eikelboom, Roelof (R);

Affiliation: Department of Psychology, Wilfrid Laurier University, 75 University Avenue West, Waterloo, Ontario, Canada N2L 3C5.

Journal and publication information

Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't

Journal: Physiology & behavior (Physiol Behav), published in United States. (Language: eng)

Reference: 2006-Oct; vol 89 (issue 3) : pp 428-37

Dates: Created 2006/10/02; Completed 2006/12/12;

PMID: 16904712, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Analysis of Variance
Animals
Behavior, Animal
Body Weight - physiology
Conditioning (Psychology) - physiology
Eating - physiology
Feeding Behavior - physiology
Male
Rats

Rats
Rats, Sprague-Dawley
Recognition (Psychology) - physiology
Repression
Running
Sucrose - administration & dosage
Sweetening Agents - administration & dosage
Taste - physiology
Time Factors

Associated Chemicals: Sweetening Agents (0) ; Sucrose (57-50-1)

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