在老年人中,皮层-海马体相互作用是模式支持的记忆编码的基础
Shenyang Huang1, Paul C Bogdan1, Cortney M Howard1
1Department of Psychology and Neuroscience, Duke University, Durham, NC 27708.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
老年人 (OA) 在使用方案时表现出改善的情节性记忆,特别是在通过角性环-海马相互作用. 这表明,语义知识的补偿机制有助于老化时的记忆编码.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
- 衰老研究研究 衰老研究
背景情况:
- 情节性记忆随着年龄的增长而下降,但语义知识可以减轻这一点.
- 图表知识可以增强记忆力,特别是在老年人 (OA).
- 以前的研究将该方案的使用与腹中前额叶皮层 (vmPFC) 和海马体 (HPC) 联系起来,主要是在年轻人 (YA) 中.
研究的目的:
- 研究OAS中模式诱导的情节性记忆增强的神经机制.
- 为了比较图表如何在OAs与YAs中提高记忆,使用fMRI.
- 在记忆编码过程中,探索皮质-海马体相互作用的年龄相关差异.
主要方法:
- 功能性磁共振成像 (fMRI) 在编码场景对象对与不同的模式一致性.
- 编码后的第二天进行记忆回忆测试.
- 分析海马皮层调制 (HPC) 预测后续记忆.
主要成果:
- 图表一致性在YA和OA中增强了对象记忆,在OA中影响更大.
- 在这两个年龄组中,vmPFC调节HPC增强记忆.
- 在OA中,对HPC增强记忆的角性转移 (AG) 调制,特别是在OA.
- OA显示了优选的AG-HPC交互,这表明可以使用补偿性的语义知识.
结论:
- 方案显著提高了老年人的情节性记忆编码.
- 老年人利用不同的皮质-海马体通路,特别是AG-HPC,以基于模式的记忆增强.
- 结果突出了与年龄相关的神经战略的差异,用于利用语义知识来支持记忆.
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