由威胁迫在眉引起的学习飞行的下丘脑控制
Anita Torossian1, Blake A Miranda1, Fernando M C V Reis1
1Department of Psychology, University of California, Los Angeles, California, 90095.
概括
小鼠学会了逃脱模拟的追逐. 在学习过程中抑制特定的下丘脑神经元损害了这种学会的逃避,显示了它们在维持生存威胁记忆中的关键作用.
科学领域:
- 神经科学是一个神经科学.
- 行为生物学 行为生物学
- 学习和记忆的学习和记忆
背景情况:
- 灵活,学会的逃生行为对于生存至关重要.
- 以前的研究主要集中在先天的威胁上,使得条件逃脱的理解变得不太清楚.
- 已知背前乳母细胞核 (PMd) 和其胆囊托基宁 (cck) 表达细胞参与天生的逃脱和学习防御.
研究的目的:
- 研究PMd-cck神经元在获得和维持条件逃避行为的作用.
- 为了确定PMd-cck神经元是否特别参与从移动威胁中学会逃脱.
- 探索PMd-cck神经元如何编码与威胁和逃生反应相关的信息.
主要方法:
- 开发了一种新的"飞行在网格上接近" (FUGA) 范式,在这个范式中,小鼠学会逃离移动的,产生冲击的网格.
- 在FUGA学习阶段利用光遗传抑制来准PMd-cck神经元.
- 在随后的恐惧检索测试中评估了学会的逃跑行为,没有冲击.
- 在FUGA范式中对PMd-cck抑制的比较效果与传统的上下文和听觉诱导的恐惧条件.
- 在FUGA任务中记录PMd-cck细胞的神经活动.
主要成果:
- 在FUGA获取过程中抑制PMd-cck神经元显著损害了在恐惧检索过程中学会的逃避行为.
- 这种损伤是移动威胁范式的特点;PMd-cck抑制没有影响在上下文或听觉调节任务中的恐惧条件.
- PMd-cck细胞显示与移动网格距离和逃跑速度相关的活性.
- 这些细胞没有被恐惧条件的音调或冷条件激活,这表明特异性.
结论:
- PMd-cck神经元对于维护与移动威胁相关的学习逃生记忆至关重要.
- 下丘脑,特别是PMd-cck电路,在灵活,经验依赖的生存行为中起着关键作用.
- 这项研究强调了PMd在学习和记忆威胁相关信息以适应性逃生反应方面的重要性.
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