在工作记忆维护期间的持续活动预测了人类海马体的长期记忆形成.
Jonathan Daume1,2,3, Jan Kamiński4, Yousef Salimpour5
1Department of Neurosurgery, Cedars-Sinai Medical Center, Los Angeles, CA.
bioRxiv : the preprint server for biology
|July 29, 2024
概括
这项研究表明,海马持续活动支持工作记忆维护和长期记忆编码,这表明这些认知系统的共同神经基础.
科学领域:
- 认知神经科学 认知神经科学
- 神经生物学 神经生物学 神经生物学
- 人类记忆系统 人类记忆系统
背景情况:
- 工作记忆 (WM) 和长期记忆 (LTM) 传统上被认为是不同的认知系统.
- 在记忆形成过程中,WM和LTM之间的相互作用仍然不太清楚.
研究的目的:
- 研究WM和LTM之间的相互作用背后的神经机制.
- 为了确定人类中枢叶单个神经元是否有助于维护WM和LTM编码.
主要方法:
- 单个神经元的记录是在人类的中间叶 (海马和杏仁体) 中进行的.
- 在WM维护新品和随后的LTM识别记忆测试期间记录了神经活动.
- 分析的重点是内容选择性持续活动和在WM和LTM检索期间视觉唤起的活动.
主要成果:
- 在WM维护期间海马持续活动预测了随后的LTM识别信心.
- 在同一个细胞中视觉唤起的活动并不能预测LTM的形成.
- 记忆选择性神经元对熟悉的刺激表现出更强烈的反应,在LTM检索过程中具有较高的先前WM持久活性.
结论:
- 海马持续活动在WM维护和LTM编码中起着双重作用.
- 这一发现揭示了WM和LTM系统共享的单个神经元机制.
- 该研究通过确定共享的神经基质来弥合WM和LTM之间的差距.
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