成年人一生中结构和休息状态功能大脑网络组织的年龄相关差异:一个横截面研究
Maedeh Khalilian1, Monica N Toba1,2, Martine Roussel1
1Laboratory of Functional Neuroscience and Pathologies (UR UPJV 4559), University Research Center (CURS), University of Picardy Jules Verne, Amiens, France.
Aging brain
|January 26, 2024
概括
大脑网络显示了与年龄相关的连接和组织变化. 老年人表现出改变的整合,隔离和脆弱性,突出显示了大脑结构和功能的寿命差异.
科学领域:
- 神经科学是一个神经科学.
- 衰老研究研究 衰老研究
- 网络科学 网络科学
背景情况:
- 大脑的结构和功能网络表现出复杂的组织,包括丰富的俱乐部 (RC) 架构和小世界拓.
- 了解这些网络中的与年龄相关的变化对于理解认知衰老和神经健康至关重要.
研究的目的:
- 研究大脑结构和功能网络拓学和层次组织中的与年龄相关的趋势.
- 在功能子系统中探索RC参与的特定年龄模式.
- 评估结构-功能合的年龄相关差异以及网络易受丰富俱乐部损害的脆弱性.
主要方法:
- 利用扩散权重成像 (DWI) 和休息状态功能磁共振成像 (fMRI) 数据来自大量健康的老年人群.
- 使用高分辨率的功能分片来分析RC参与功能子系统的情况.
- 评估了结构-功能合和网络脆弱性,以应对丰富的俱乐部连接中断.
主要成果:
- 结构性和功能性大脑网络在各个年龄段都始终显示出丰富的俱乐部组织和小世界拓.
- 年长的成年人在特定的大脑区域 (前额外外,小脑) 的整合和分离减少,功能网络属性发生变化 (前额外,中 Temporal,部区域).
- 在感官运动,认知和皮下网络中观察到与年龄相关的结构功能合的下降,网络对丰富的俱乐部损伤的脆弱性增加,尽管70岁以上的人的整体脆弱性下降了.
结论:
- 大脑功能和结构RC连接存在与年龄相关的显著差异,在成年人寿命中存在差异.
- 老龄化影响网络集成,隔离和脆弱性,结构性与功能性网络的模式不同.
- 研究结果提供了关于健康衰老的神经生物学基础的见解,以及干预的潜在目标.
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