抑制性避开的概括和区分差异性地参与前和后后子子区域
Erisa Met Hoxha1, Payton K Robinson1, Kaitlyn M Greer1
1Purdue University Department of Psychological Sciences, West Lafayette, IN, United States.
Frontiers in behavioral neuroscience
|February 2, 2024
概括
恐惧记忆可以概括到新的背景. 研究人员发现,后后皮质 (pRSC) 特别跟踪一般化回避,而RSC中的围神经网络可能会抑制记忆巩固.
科学领域:
- 神经科学是一个神经科学.
- 行为科学 行为科学
- 记忆研究 记忆研究
背景情况:
- 恐惧调节通常会导致特定的避开行为.
- 然而,普遍的恐惧可以扩展到新的背景,表明情境歧视的失败.
- 恐惧记忆概括的基础的神经机制仍然不完全理解.
研究的目的:
- 为了研究后皮质 (RSC) 在恐惧记忆概括中的作用.
- 为了确定RSC的特定子区域是否不同地参与了上下文歧视与概括.
- 探索围神经网络 (PNNs),突触可塑性和恐惧记忆概括之间的关系.
主要方法:
- 在长埃文斯大鼠中使用了抑制性回避范式.
- 测试发生在训练环境中或在不同的照明条件下 (明亮与黑暗) 的转移环境中.
- 在RSC中立即早期基因zif268和PNN的表达被分析后测试.
主要成果:
- 在明亮的环境中观察到特定于背景的回避,但在黑暗的环境中发生了概括.
- 前侧RSC (aRSC) 的活动与一般学会的回避相关,而后侧RSC (pRSC) 的活动与一般记忆相关.
- 在RSC中PNN的减少与记忆形成有关,但在表现出普遍回避的动物中PNN保持不变.
结论:
- 这项研究揭示了RSC子区域在 rostrocaudal轴沿线在恐惧记忆概括和歧视中的差异性参与.
- 对于编码通用回避记忆来说,pRSC似乎至关重要.
- 在RSC中完整的PNN可能在防止记忆巩固和促进概括方面发挥作用.
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