| Fasting increases and satiation decreases olfactory detection for a neutral odor in rats. | |
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MedLine Citation:
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PMID: 17367877 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Olfaction plays a fundamental role in feeding behavior, but changes in olfactory acuity according to feeding states have never been precisely demonstrated in animals. The present study assesses the olfactory detection performance of fasted or satiated rats placed under a strictly controlled food-intake regimen. We did this using a conditioned odor aversion (COA) protocol which induced in rats an almost total aversion to an ISO-odorized drink at 10(-5) (1 microl in 100 ml of water). The rats (either fasted or satiated) were then presented with different concentrations of ISO-odorized water to compare their ability to detect and so avoid the ISO drink. In both states, the rats consumed significantly larger volumes of ISO at 10(-10), 10(-9) and 10(-8) than at 10(-5), suggesting lower detection at these three concentrations, although the fasted rats consumed significantly less ISO drink than did the satiated ones, showing better ISO detection at these concentrations. These experiments provide original data demonstrating the expected fact that olfactory sensitivity increases in fasted animals. Since these results were obtained using a neutral odor, we suggest that olfactory acuity increases during fasting, enabling animals to more easily detect both food and environmental odors such as those of predators. This would have an obvious eco-ethological role by increasing the relevance of olfactory inputs when seeking food. |
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Authors:
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P Aimé; P Duchamp-Viret; M A Chaput; A Savigner; M Mahfouz; A K Julliard |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-02-17 |
Journal Detail:
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Title: Behavioural brain research Volume: 179 ISSN: 0166-4328 ISO Abbreviation: Behav. Brain Res. Publication Date: 2007 May |
Date Detail:
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Created Date: 2007-04-02 Completed Date: 2007-06-05 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8004872 Medline TA: Behav Brain Res Country: Netherlands |
Other Details:
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Languages: eng Pagination: 258-64 Citation Subset: IM |
Affiliation:
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Laboratoire de Neurosciences Sensorielles, Comportement, Cognition, CNRS, UMR 5020, Université Claude Bernard Lyon 1, 50 Avenue Tony Garnier, 69366 Lyon Cedex 07, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Appetite Regulation / physiology Avoidance Learning / physiology Fasting / physiology* Male Nutritional Status / physiology Rats Rats, Wistar Satiation / physiology* Sensory Thresholds / physiology* Signal Detection, Psychological / physiology* Smell / physiology* Statistics, Nonparametric |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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