相关实验视频
Updated: Jul 22, 2026

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Hyponeophagia: A Measure of Anxiety in the Mouse
Published on: May 17, 2011
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在青少年压力强大的雄性子中,模糊的食物有条件地表现出类似于偏好的行为
Kevin M Moran1, Leah Jarrell1, Misheel Khashchuluun1
1Psychology Department, The University of Texas at Austin, Austin, TX 78712, USA.
Behavioural brain research
|September 5, 2024
概括
青少年社会压力增加了仓鼠的体重增加和肥胖. 意想不到的是,压力减少了食物奖励位置偏好,这表明当资源变得不可靠时,适应性食行为.
科学领域:
- 行为神经科学 行为神经科学
- 压力研究 压力研究
- 肥胖研究 肥胖研究
背景情况:
- 青少年的社会压力与长期的体重增加,肥胖和积有关.
- 有条件的位置偏好 (CPP) 是一种衡量寻求奖励的行为,通常由滥用药物增强.
研究的目的:
- 为了调查青少年的社会压力是否会增强子对食物奖励的有条件位置偏好 (CPP) 行为.
- 为了检查压力,身体脂肪和食物奖励寻求之间的关系.
主要方法:
- 在青春期早期,青少年仓鼠被暴露在日常的社会压力中两周.
- 训练动物将V形迷宫与食物奖励联系起来.
- 在应激暴露的最后一天评估了类似于条件化的位置偏好 (CPP) 的行为.
主要成果:
- 社会压力显著增加了体重增加,食物摄入量,食物效率和身体脂肪.
- 与预期相反,与对照组相比,应激暴露减少了与CPP类似的食物奖励行为.
- 在对照组中,CPP和体脂肪之间的正相关性被反转为压力较大的仓鼠中轻微的负相关性.
结论:
- 青少年的社会压力会导致肥胖,并改变与食物相关的奖励处理.
- 压力减少了对食物奖励的偏好,这表明当食物资源被认为不可靠时,适应性行为转变.
- 这些发现突显了在食动物中压力,新陈代谢和寻求奖励之间的复杂相互作用.
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