丧的非奖励:在消耗的连续负对比后,杏仁体中详细的c-Fos表达模式
David Arjol1, Antonio D R Agüera2, Christopher Hagen3
1Facultad de Psicología, Universidad de Sevilla, Sevilla, Spain.
Neurobiology of learning and memory
|May 30, 2024
概括
丧的非奖励,或奖励下移,只有当奖励差异很大时才会激活特定的杏仁体区域,正如c-Fos表达式所示. 较小的奖励变化并没有激活这些大脑区域.
科学领域:
- 神经科学是一个神经科学.
- 行为神经科学 行为神经科学
- 奖励处理 奖励处理
背景情况:
- 杏仁体参与处理令人丧的非奖励,特别是在意想不到的奖励下降后.
- 关于杏仁体参与奖励下移的现有研究主要集中在宽核上,缺乏特异性.
- 目前尚不清楚奖励下调期间桃体激活是否需要消耗性连续负对比 (cSNC) 效应或仅仅消耗性抑制.
研究的目的:
- 为了研究由奖励下移激活的特定杏仁核.
- 要确定杏仁体激活是否需要显著的奖励差异和cSNC效应.
- 确定涉及cSNC效应的精确杏仁体子区域.
主要方法:
- 使用了三组老鼠:导致cSNC的巨大奖励差异 (32%至2%的糖糖),导致没有cSNC的抑制的小奖励差异 (8%至2%的糖糖),以及对照组 (2%的糖糖).
- 在第一个奖励下调会话后收集了大脑组织.
- 神经激活的标志物c-Fos表达在底侧桃体,中心桃体和中间桃体的特定区域被量化.
主要成果:
- 与对照组相比,在奖励差异较大的组中,在四个特定的杏仁体子区域 (前/中侧基底杏仁体,中侧囊中枢杏仁体,前前腹中枢杏仁体) 观察到显著的c-Fos表达.
- 在小奖励差异组和不转移的对照组之间没有发现差异性c-Fos表达.
- 杏仁体的激活取决于暴露于相当大的奖励差异.
结论:
- 实质性的奖励差异是必要的杏仁体在奖励下移期间的激活.
- 这项研究确定了特定的杏仁体区域,这些区域对于理解cSNC效应至关重要.
- 这些发现表明,未来的研究将重点放在这些已识别的杏仁体区域在奖励处理和下移反应中的功能作用上.
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