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在看电影期间,海马体亚区域连接模式的寿命差异

Can Fenerci¹, Roni Setton², Giulia Baracchini³

¹Department of Psychology, McGill University, Montreal, QC, Canada.

Neurobiology of aging

|July 5, 2024

概括

衰老会改变大脑的连接,特别是海马体和其他大脑网络之间的连接. 这些连接的变化,而不是海马本身的变化,预测了老年人的记忆力下降.

科学领域:

神经科学是一个神经科学.
认知老龄化认知老龄化
神经成像是一种神经成像.

背景情况:

随着年龄的增长,情节性记忆力下降是常见的.
海马对记忆至关重要,但在衰老过程中它的网络连接尚未完全理解.

研究的目的:

研究老化如何影响海马体内的功能连接,以及在记忆编码过程中海马体和皮质网络之间的功能连接.
为了确定这些连接变化是否能预测整个寿命的内存性能.

主要方法:

利用了来自CamCAN数据集的功能磁共振成像 (fMRI) 数据 (N=643,年龄18-88岁).
在电影观看任务 (自然主义记忆编码) 期间,分析了海马子区域 (前,后) 与皮质网络的连接概况.

主要成果:

衰老降低了逆侧海马子区域的连接性.
观察到前海马与控制,背部注意力和默认模式网络之间的合增加.
在后部海马体和这些相同网络中的一些网络之间注意到合的减少.
hippocampal-cortical连接的年龄相关变化,但不是海马内连接,预测记忆性能.

结论:

衰老显著改变海马的功能地形及其与主要大脑网络的连接.
皮质-海马脉连接的变化是与年龄相关的情节性记忆衰退的敏感指标.

关键词:

衰老的衰老衰老的衰老情节性记忆是一种情节性记忆.功能连接性的功能连接性.在海马体内,海马体

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