Flavor preferences conditioned by sugars: rats learn to prefer glucose over fructose.
Title | Flavor preferences conditioned by sugars: rats learn to prefer glucose over fructose. |
Publication Type | Journal Article |
Year of Publication | 1991 |
Authors | Ackroff, K., & Sclafani A. |
Journal | Physiology & behavior |
Volume | 50 |
Issue | 4 |
Pagination | 815-24 |
Date Published | 1991 Oct |
Keywords | Animals, Association Learning, Choice Behavior, Conditioning, Classical, Female, Fructose, Glucans, Glucose, Male, Mental Recall, Rats, Taste, 味觉生理, 嗅觉生理, 食物选择 |
Abstract | The reinforcing effects of glucose and fructose were compared using flavor preference conditioning paradigms. Female rats given access to flavored glucose and flavored fructose solutions developed preferences for the glucose- over the fructose-paired flavor, as well as for unflavored glucose over unflavored fructose. This effect was obtained with 8% and 32% solutions, and with nondeprived and deprived rats. In most cases, the glucose preference was not immediate but appeared only after the rats had one-bottle experience with the two sugars. Female rats also preferred a glucose-paired flavor over a flavor that was paired with a noncaloric saccharin solution. A similar but somewhat weaker preference was displayed for a fructose-paired flavor over a saccharin-paired flavor. Both male and female rats acquired preferences for flavored chow that was paired with the intake of a 32% glucose solution over flavored chow paired with 32% fructose intake. Together, these results indicate that glucose has more potent postingestive reinforcing effects than does fructose. This may explain why rats consume more glucose than fructose in one-bottle acceptance as well as two-bottle preference tests. |
Alternate Journal | Physiol. Behav. |
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