Title | The CS-US delay gradient in flavor preference conditioning with intragastric carbohydrate infusions. |
Publication Type | Journal Article |
Year of Publication | 2011 |
Authors | Ackroff, K. [1], Drucker D. B. [2], & Sclafani A. [3] |
Journal | Physiology & behavior |
Date Published | 2011 Aug 5 |
Keywords | 味觉生理 [4], 嗅觉生理 [5], 食物选择 [6] |
Abstract | Rats are able to associate a flavor with the delayed presentation of food, but the obtained flavor preferences are often weak. The present studies evaluated the effect of delay between a flavor CS and a post-oral nutrient US on the expression of conditioned flavor preferences. In Experiment 1, rats were trained with two CS flavors: one was followed after a delay by intragastric infusion of 8% glucose, and the other was followed after the same delay by intragastric water. Rats trained with 2.5, 10, and 30-min delays expressed significant (84-68%) preferences for the glucose-paired flavor whereas rats trained with 60-min delays were indifferent (51%). Experiment 2 examined flavor conditioning over a 60-min delay using 8 or 16% Polycose based on findings that orally consumed Polycose conditions preferences at this delay interval. The 8 and 16% Polycose infusions produced significant preferences which peaked at 62% and 73%, respectively. The ability to bridge these delays may allow animals to learn about slowly digested foods. |
Links:
[1] http://www.hisynergi.com/en/literature/author/258
[2] http://www.hisynergi.com/en/literature/author/301
[3] http://www.hisynergi.com/en/literature/author/259
[4] http://www.hisynergi.com/en/literature/keyword/356
[5] http://www.hisynergi.com/en/literature/keyword/298
[6] http://www.hisynergi.com/en/literature/keyword/262