952-恐惧记忆印迹的亚群解析 episode artwork

EPISODE · May 12, 2026 · 24 MIN

952-恐惧记忆印迹的亚群解析

from 聊聊Sci

这项研究利用高时间分辨率的 f-FLiCRE 术,精确解析了小鼠海马体 CA1 区在恐惧记忆形成过程中的神经元集群。研究人员将学习过程细分为电击前、电击时、僵直行为及非僵直四个阶段,发现只有在受电击和表现出恐惧僵直时活跃的细胞子集,才是构成记忆印迹(engram)的核心,足以驱动记忆的提取。通过光遗传学验证,操纵这些特定的神经元集群可以人为开启或关闭恐惧记忆。相比之下,环境探索阶段和非恐惧状态下的神经元虽在活动,却并不参与记忆印迹的整合。钙成像分析进一步证实,这些不同的细胞群在空间上高度独立,且具有独特的放电动力学特征。该研究揭示了大脑如何从连续的经历中筛选特定信息,并将其转化为持久关联记忆的生物学机制。References:Pouget C, Morier F, Autore L, et al. Deconstruction of a memory engram reveals distinct ensembles recruited at learning[J]. Nature Neuroscience, 2026: 1-9.前往小宇宙评论区与主播互动

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952-恐惧记忆印迹的亚群解析

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