Myers Kevin P
Department of Psychology, Bucknell University, Lewisburg, PA 17837, USA.
Appetite. 2007 Jan;48(1):123-7. doi: 10.1016/j.appet.2006.07.077. Epub 2006 Sep 18.
Rats learn to prefer flavors followed by postingestive action of nutrients. This experiment demonstrates that such preferences can be acquired with only a single, brief pairing of a novel flavor with intragastric (IG) glucose infusion. Male rats with IG catheters consumed unflavored saccharin in daily 10-min sessions, and then received in counterbalanced order on separate days a single pairing of coffee- or vinegar-flavored saccharin with IG glucose, and of the opposite flavor with IG water. Rats subsequently preferred the glucose-paired flavor in a choice test in the absence of glucose infusion. Preference was robust, persisting through repeated non-reinforced testing.
大鼠学会偏好那些随后会有营养物质摄入后效应的味道。本实验表明，仅通过将一种新味道与胃内（IG）葡萄糖输注进行一次短暂配对，就能获得这种偏好。植入IG导管的雄性大鼠在每天10分钟的时间段内饮用无味糖精，然后在不同的日子里以平衡的顺序接受一次咖啡味或醋味糖精与IG葡萄糖的配对，以及相反味道与IG水的配对。随后，在没有葡萄糖输注的选择测试中，大鼠更喜欢与葡萄糖配对的味道。这种偏好很强烈，在反复的非强化测试中持续存在。
