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Nutrient-conditioned flavor preference and incentive value measured by progressive ratio licking in rats.

标题Nutrient-conditioned flavor preference and incentive value measured by progressive ratio licking in rats.
文章类型Journal Article
发表年度2006
作者Sclafani, A. [1], & Ackroff K. [2]
期刊Physiology & behavior
卷88
期1-2
页码88-94
发表日期2006 Jun 15
关键词Animals [3], Behavior, Animal [4], Choice Behavior [5], Conditioning, Operant [6], Drinking Behavior [7], Female [8], Food Deprivation [9], Food Preferences [10], Glucose Solution, Hypertonic [11], Motivation [12], Nutritional Physiological Phenomena [13], Rats [14], Rats, Sprague-Dawley [15], Reinforcement Schedule [16], saccharin [17], Sweetening Agents [18], Taste [19], 味觉生理 [20], 食物选择 [21]
摘要

Rats develop strong preferences for flavors associated with the postingestive actions of glucose and other nutrients. This preference may involve changes in both the hedonic appeal and incentive salience of the nutrient-paired flavor. The present study used a progressive ratio (PR) operant licking task to evaluate the degree to which nutrient conditioning changes the incentive value of flavors. Food restricted rats were trained to associate one flavored saccharin solution (CS+) with intragastric glucose infusions and another flavored solution (CS-) with water infusions. The rats subsequently showed a strong preference for the CS+ in two-bottle tests and also licked more for the CS+ than CS- in PR tests. PR licking for the CS+ was similar to that for an 8% fructose solution. Together with earlier data indicating that the CS- is isopreferred to a 3% fructose solution, these findings indicate that IG glucose conditioning enhances the hedonic and incentive value of the CS+ solution so that the animal responds as if the solution had a sweeter taste.
Alternate JournalPhysiol. Behav.
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