Forced swimming after the intake of a flavored solution causes aversion to that flavor in rats. The study reported here presents a new finding that forced swimming results in conditioned place aversion. In Experiment 1, a rat's confinement in one of two distinctive chambers—either with vertical stripes on the wall or horizontal stripes—was followed by a 20-min swimming opportunity, while the other chamber did not have this swimming exposure. After the repetitions of these treatments (i.e., the differential conditioning training), a choice preference test was administered, where the rat was given free access to both chambers. The choice test demonstrated that the rats spent less time in the swimming-paired chamber than in the unpaired chamber. Experiment 2 showed that not only a 20-min swimming session but also a 1-min swimming session endowed rats with aversion to the swimming-paired chamber. These results were discussed with regard to the underlying mechanism of swimming-based aversion learning.

中文翻译：

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基于大鼠强迫游泳的条件性场所厌恶

摄入调味溶液后强迫游泳会导致老鼠厌恶这种味道。这里报告的研究提出了一项新发现，即强迫游泳会导致条件性场所厌恶。在实验 1 中，将老鼠限制在两个独特的房间（墙壁上有垂直条纹或水平条纹）之一中，然后进行 20 分钟的游泳机会，而另一个房间则没有这种游泳机会。重复这些治疗（即差异调节训练）后，进行选择偏好测试，其中大鼠可以自由进入两个室。选择测试表明，大鼠在游泳配对室中花费的时间比在未配对室中花费的时间少。实验2表明，不仅20分钟的游泳时间，而且1分钟的游泳时间都会使大鼠对游泳配对室产生厌恶感。这些结果是关于基于游泳的厌恶学习的潜在机制进行讨论的。