功能连接和微观结构网络与健康老年人不同执行功能的个体间变量相关
Friederike Thams1, Shu-Chen Li2, Agnes Flöel3
1Department of Neurology, Universitätsmedizin Greifswald, Ferdinand-Sauerbruch-Straße, 17475 Greifswald, Germany.
Neuroscience
|June 15, 2023
概括
这项研究揭示了与老年人执行功能相关的独特大脑连接模式. 改善工作记忆更新和决策与特定的功能和结构性大脑网络变化相关.
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:
- 执行功能对于日常生活至关重要,但随着年龄的增长而下降.
- 工作记忆更新和基于价值的决策特别容易受到与年龄相关的变化的影响.
- 这些功能的神经相关性在年轻人中是众所周知的,但在老年人群中不太了解.
研究的目的:
- 为了全面划分大脑基质,这些基质是老年人特定执行功能的基础.
- 确定旨在缓解与年龄相关的认知衰退的干预措施的潜在目标.
- 描述工作记忆更新和决策的功能和结构连接相关性.
主要方法:
- 评估了48名老年人的信件更新和马尔科夫决策任务表现.
- 使用静止状态功能磁共振成像 (fMRI) 来量化前对面和默认模式网络中的功能连接 (FC).
- 使用扩散张力成像 (DTI) 评估白质微观结构通过基于导管的分数异构 (FA).
主要成果:
- 优异的字母更新性能与背侧前额皮层和前额/海马区域之间更高的FC相关.
- 更好的马尔科夫决策表现与基底性和角性之间CF降低有关.
- 提升工作记忆更新性能与更高的环带和上纵带的FA相关,环带FA对性能差异有独特的贡献.
结论:
- 这项研究描述了与老年人特定执行功能相关的独特的功能和结构性大脑连接模式.
- 这些发现有助于了解衰老中更新和决策的神经基础.
- 提供了针对特定神经网络的有针对性调制的基础,以对抗认知衰退.
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