Odor-reward learning and enrichment have similar effects on odor perception.

Full Abstract

We compared the respective effects of odor enrichment and reward-driven discrimination learning on the perception of odors. Experimental rats were exposed to two odorants for 1-h periods once daily over 10 days, or trained with the same two odorants in a forced-choice discrimination task during a daily 20 trial session over 10 days. Spontaneous discriminations between pairs of chemically similar odors were tested before and after the odor enrichment period using an olfactory habituation/discrimination task. We found that both enrichment and discrimination learning improved the subsequent perception of other, chemically unrelated odorants in similar manners. These results show that odor experience, whether passive or active, changes perception in the manner predicted based on other groups' electrophysiological experiments.

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Author information

Author/s: Escanilla, Olga (O); Mandairon, Nathalie (N); Linster, Christiane (C);

Affiliation: Department of Neurobiology and Behavior, Cornell University, Ithaca, New York 14853, United States.

Journal and publication information

Publication Type: Comparative Study; Journal Article

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

Reference: 2008-Jul; vol 94 (issue 4) : pp 621-6

Dates: Created 2008/06/02; Completed 2008/09/04;

PMID: 18455204, status: MEDLINE (last retrieval date: 11/6/2008)

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Animals
Association Learning - physiology
Attention - physiology
Conditioning, Classical - physiology
Discrimination Learning - physiology
Environment
Exploratory Behavior - physiology
Habituation, Psychophysiologic - physiology

Male
Odors
Perception - physiology
Rats
Rats, Sprague-Dawley
Reward
Sensory Thresholds - physiology
Smell - physiology

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