在老化过程中,白质和灰质双部分网络的功能性变化
Yurui Gao1, Yu Zhao2, Muwei Li2
1Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, TN, USA; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA.
NeuroImage
|July 20, 2023
概括
正常的衰老改变了白质 (WM) 和灰质 (GM) 之间的大脑连接. 一个新的双边图模型揭示了WM-GM功能连接 (FC) 密度和全球效率 (GE) 在各种大脑网络中与年龄相关的下降.
科学领域:
- 神经科学是一个神经科学.
- 脑部成像 脑部成像
- 网络科学 网络科学
背景情况:
- 已知在衰老过程中灰质 (GM) 的功能连接性 (FC) 变化.
- 与年龄相关的对白质 (WM) -GM FC的影响仍然不清楚.
- 传统的图形模型很难评估WM-GM FC网络属性,例如全球效率 (GE).
研究的目的:
- 开发和应用一种新的双边图形模型来描述WM-GM FC网络.
- 在成年期间调查WM-GM FC属性的与年龄相关的变化.
- 量化与网络老化相关的网络效率和密度的变化.
主要方法:
- 为了分析WM-GM FC,开发了一种双边图形模型.
- 包括GE在内的网络属性在1462名认知正常受试者 (年龄22-96岁) 中进行了评估.
- 使用了来自ADNI,BLSA和OASIS-3数据库的数据.
主要成果:
- 特定区域的WM-GM FC显示了异质的变化,其下降主要发生在成年后期.
- 支持记忆,执行功能和处理速度的WM捆绑的FC密度随着年龄的增长而下降.
- 随着年龄的增长,GE在注意力,默认,体力运动,前体双脚和边缘网络上下降;视觉网络GE在成年后期下降.
结论:
- 正常的衰老会导致WM-GM功能同步的多层次变化.
- 双边图模型为量化参与WM的网络提供了一个新的框架.
- 研究结果提供了关于老龄化过程中大脑网络变化的见解,以及神经科学研究中的潜在应用.
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