标题 | Glucose- and fructose-conditioned flavor preferences in rats: taste versus postingestive conditioning. |
文章类型 | Journal Article |
发表年度 | 1994 |
作者 | Sclafani, A. [1], & Ackroff K. [2] |
期刊 | Physiology & behavior |
卷 | 56 |
期 | 2 |
页码 | 399-405 |
发表日期 | 1994 Aug |
关键词 | Animals [3], Association Learning [4], Conditioning, Classical [5], Female [6], Food Preferences [7], Fructose [8], Glucose [9], Rats [10], saccharin [11], Satiety Response [12], Taste [13], 味觉生理 [14], 嗅觉生理 [15] |
摘要 | Flavor preferences conditioned by glucose and fructose were compared using two training methods. With the simultaneous method preferences can be reinforced by the flavor and/or the postingestive consequences of nutrients, whereas with the delayed method preferences are reinforced only by postingestive nutritive effects. In Experiment 1, food-deprived rats displayed similar preferences for flavors (CS+) added to an 8% glucose or 8% fructose solution over flavors (CS-) added to a noncaloric saccharin solution (simultaneous conditioning). Other rats learned to prefer a CS+ flavor paired with the delayed (10 min) presentation of 8% glucose over a CS- flavor paired with delayed saccharin. Fructose failed to condition a flavor preference with the delayed paradigm. Taken together, these data suggest that the preference for a flavor mixed in a fructose solution is reinforced by the sweet taste, not the postingestive effects of the sugar. Experiment 2 tested this idea by devaluing the taste of the sugar solutions by quinine adulteration. Rats initially avoided both glucose-quinine and fructose-quinine solutions in favor of a saccharin solution. Following one-bottle training, they came to prefer the glucose-quinine but not the fructose-quinine solution over the saccharin solution. The glucose-trained rats also showed stronger preferences for sucrose-quinine solutions than did the fructose-trained rats. These findings, along with other recent data, indicate that fructose-conditioned preferences are based primarily on the sugar's palatable taste. Glucose, in contrast, can condition strong preferences based on its taste as well as its postingestive actions. |
Alternate Journal | Physiol. Behav. |
Links:
[1] http://www.hisynergi.com/literature/author/294
[2] http://www.hisynergi.com/literature/author/305
[3] http://www.hisynergi.com/literature/keyword/1
[4] http://www.hisynergi.com/literature/keyword/341
[5] http://www.hisynergi.com/literature/keyword/255
[6] http://www.hisynergi.com/literature/keyword/162
[7] http://www.hisynergi.com/literature/keyword/8
[8] http://www.hisynergi.com/literature/keyword/350
[9] http://www.hisynergi.com/literature/keyword/121
[10] http://www.hisynergi.com/literature/keyword/345
[11] http://www.hisynergi.com/literature/keyword/42
[12] http://www.hisynergi.com/literature/keyword/222
[13] http://www.hisynergi.com/literature/keyword/4
[14] http://www.hisynergi.com/literature/keyword/356
[15] http://www.hisynergi.com/literature/keyword/298