Flavor preferences conditioned by sugars: rats learn to prefer glucose over fructose.
标题 | Flavor preferences conditioned by sugars: rats learn to prefer glucose over fructose. |
文章类型 | Journal Article |
发表年度 | 1991 |
作者 | Ackroff, K., & Sclafani A. |
期刊 | Physiology & behavior |
卷 | 50 |
期 | 4 |
页码 | 815-24 |
发表日期 | 1991 Oct |
关键词 | 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 |
摘要 | 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. |