与阿尔茨海默氏症相关的认知功能障碍和衰老对功能性大脑网络分离的分离效应
Ziwei Zhang1, Micaela Y Chan1, Liang Han1
1Center for Vital Longevity and School of Behavioral and Brain Sciences, University of Texas at Dallas, Dallas, Texas 75235.
概括
阿尔茨海默氏症 (AD) 和衰老都会减少大脑网络分离,但AD会导致影响感觉运动系统的更广泛的变化,独立于粉样蛋白. 这突显了AD与正常衰老的独特网络漏洞.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 医疗成像医学成像
背景情况:
- 阿尔茨海默病 (AD) 与大规模功能性大脑网络组织的改变有关.
- 在AD和正常衰老中观察到大脑网络分离的减少.
- 区分AD特异性网络变化与与年龄相关的变化对于AD的表征至关重要.
研究的目的:
- 研究AD痴呆症严重程度和年龄对大脑网络组织的独立和重叠影响.
- 为了确定AD中的功能网络变化是否与粉样蛋白病理学不同.
- 了解AD与衰老影响的特定大脑系统和相互作用类型.
主要方法:
- 来自阿尔茨海默氏病神经成像计划 (ADNI) 的601名参与者 (326名认知健康者,275名认知受损者) 的休息状态功能大脑网络组织的分析.
- 检查了痴呆症严重程度,年龄和大脑系统隔离之间的关系.
- 研究了不同大脑系统 (关联,感官运动) 和相互作用类型 (系统内,跨系统) 的网络变化.
主要成果:
- 更大的痴呆症严重程度和年龄增加都与下脑系统分离独立相关.
- 衰老主要通过系统内部相互作用影响协会系统.
- 阿尔茨海默病痴呆症的严重程度影响了关联和感官运动系统,特别是通过跨系统相互作用,并且独立于粉样蛋白负担.
结论:
- 阿尔茨海默病和衰老对大脑的功能连接体有着不同的影响.
- 与阿尔茨海默病相关的网络变化很普遍,影响更高层次的认知,感官和运动功能.
- 功能网络组织为AD提供了一个独特的标志物,与粉样蛋白病理学不同.
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