在神经退行性疾病中,功能网络崩.
Jesse A Brown1, Alex J Lee1, Kristen Fernhoff1
1University of California, San Francisco, Memory and Aging Center, Department of Neurology, Weill Institute for Neurosciences, San Francisco, CA, USA.
bioRxiv : the preprint server for biology
|December 18, 2023
概括
阿尔茨海默病 (AD) 和前性痴呆症 (FTD) 中的大脑缩与大脑连接的改变相关,影响了痴呆症亚型和阶段的认知功能.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 医疗成像医学成像
背景情况:
- 阿尔茨海默病 (AD) 和前性痴呆症 (FTD) 的认知和行为缺陷与大脑缩和功能连接的改变有关.
- 在各种痴呆症亚型和阶段中,缩和功能连接性障碍之间的确切关系尚不清楚.
研究的目的:
- 调查结构性大脑缩和各种痴呆症亚型中的功能连接性障碍之间的关系.
- 确定这些结构-功能关系如何与认知缺陷和大脑活动梯度有关.
主要方法:
- 利用了221名阿尔茨海默病患者的结构和功能性核磁共振 (MRI) 数据,行为变体FTD,皮质细胞底综合征,初级渐进性失言症变体和100名健康对照.
- 采用部分最小平方回归来识别主要结构-功能组件和自身模式分析来解释连接变化.
主要成果:
- 确定了将整体缩与皮层低连接性和皮层下/关联皮层超连接性联系在一起的三个组成部分.
- 证明综合征特异性缩与周围损伤低连接性和远端超连接性相关.
- 发现结构和功能成分得分预测认知缺陷,连接性变化反映了大脑活动梯度.
结论:
- 大脑缩是痴呆症功能连接变化的重要驱动因素,表现为低连接和超连接模式.
- 这些结构-功能关系为AD和FTD的认知和行为缺陷的神经生物学基础提供了洞察力.
- 自身模式分析表明时间阶段和振幅崩作为缩诱导的连接性改变的机制.
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