一个海马-皮质路径检测到行动的有效性变化作为奖励的预测器
Robin Piquet1, Angélique Faugère1, Shauna L Parkes1
1Univ. Bordeaux, CNRS, INCIA, UMR 5287, 33000 Bordeaux, France.
Current biology : CB
|December 15, 2023
概括
腹部海马体 (vHPC) 对于学习上下文依赖的奖励关联至关重要,这支了以目标为导向的行动. 这个大脑区域有助于我们调整行为,当结果根据环境线索而改变时.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 行为科学 行为科学
背景情况:
- 目标导向的行动是生存和适应的基础.
- 了解语境学习的神经机制是破译目标导向行为的关键.
- 海马,特别是腹部部分,与记忆和上下文处理有关.
研究的目的:
- 研究腹部海马体 (vHPC) 在支持目标定向行动的上下文学习中的作用.
- 为了确定vHPC是否对行动结果突发事件的敏感性至关重要.
- 阐明神经路径参与适应行为改变环境背景.
主要方法:
- 激发性毒性病变和化学遗传学被用来操纵动物的vHPC活性.
- 特定于电路的操纵针对介质前额叶皮层中的vHPC终端.
- 行为范式包括工具性偶然性退化,潜伏性抑制和帕夫洛夫语境条件化.
主要成果:
- 抑制腹部海马体,但不是背部海马体,对仪器应急降解的敏感性受损.
- vHPC对于上下文结果学习至关重要,这是检测行动结果关系的变化所必需的.
- 抑制vHPC投射到中间前额叶皮层,破坏了应急学习和上下文结果学习.
结论:
- 腹部海马在语境学习中起着至关重要的作用,它调节了以目标为导向的行动.
- 涉及vHPC和中间前额叶皮层的海马皮层皮层通路对于适应行动结果突发事件的变化至关重要.
- 在vHPC操纵后,目标导向行动的缺陷源于无法学习上下文线索的预测价值.
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