海马和皮质的高频振荡在单词列表记忆过程中编排人类的语义网络
Akash Mishra1,2, Serdar Akkol1,3,4, Elizabeth Espinal1,3,5
1Northwell, New Hyde Park, NY, USA.
iScience
|April 16, 2025
概括
海马中的高频振荡 (HFOs) 对于记忆检索至关重要. 这些大脑爆发同步跨海马体和皮质的活动,提高记忆性能.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 电力生理学 电力生理学
背景情况:
- 情节性记忆依赖于海马-皮质网络协调.
- 高频振荡 (HFO) 与神经通信有关.
- 在内存网络激活中HFO的作用需要进一步阐明.
研究的目的:
- 调查HFO在记忆检索中的作用.
- 描述HFO相关活动的电生理学特性.
- 为了确定HFO是否在记忆回忆过程中同步海马和皮质区域.
主要方法:
- 在人类参与者身上进行内脑电图 (iEEG) 记录.
- 使用列表学习任务来评估内存编码和检索.
- 分析了海马体HFO (hHFO) 和它们与记忆性能和皮质活动的相关性.
主要成果:
- 在记忆编码和检索过程中hHFO的增加,与性能呈正相关性.
- 在检索过程中,hHFO与语义处理区域的宽带高频活动 (HFA) 和皮质HFO有关.
- 在hHFO和前叶HFO的同时发生与皮质HFA和THA爆发的增加有关.
结论:
- 通过激活特定的皮质网络,HFO在记忆检索中发挥着重要作用.
- HFO促进海马-皮层记忆网络中的活动同步.
- 这些发现强调了HFO作为支持情节性记忆的关键机制.
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