NRR:从静息态脑功能网络揭示老年痴呆的发生

2013-11-28 EurekAlert EurekAlert

从正常老年人到轻度认知障碍一直到老年痴呆存在渐变过程,但是转化期间脑网络是否存在一个渐变的过程? 中国太原理工大学相洁博士所在团队发表的一项关于“An abnormal resting-state functional brain network indicates progression towards Alzheimer’s disease”的研究,提取阿尔茨海默症神经成像计划数据集中正常对

从正常老年人到轻度认知障碍一直到老年痴呆存在渐变过程,但是转化期间脑网络是否存在一个渐变的过程?

中国太原理工大学相洁博士所在团队发表的一项关于“An abnormal resting-state functional brain network indicates progression towards Alzheimer’s disease”的研究,提取阿尔茨海默症神经成像计划数据集中正常对照、早期轻度认知障碍、晚期轻度认知障碍、老年痴呆等4类人群的静息态功能MRI数据,构建了相应脑网络,通过分析4者的静息态脑功能网络特性,观察老年痴呆转化之前的轻度认知障碍不同阶段的演变。【原文下载

结果发现正常对照、早期轻度认知障碍、晚期轻度认知障碍、老年痴呆静息态脑功能网络的最短路径逐步增加,而聚类系数逐步降低,表明患者表现的痴呆与脑网络整体效率降低有关系。

另外,从功能网络的角度得出从健康老年人到轻度认知障碍直至老年痴呆过程中脑区节点的网络功能渐变过程。由于脑区的节点属性改变可能反映了脑区认知功能的改变,推测由于早期的记忆、听力、语言功能下降最终导致弥漫性脑区受损和其他认知功能的衰退。

原文出处

Xiang J, Guo H, Cao R, Liang H, Chen JJ. An abnormal resting-state functional brain network indicates progression towards Alzheimer's disease. Neural Regen Res. 2013;8(30):2789-2799.【原文下载

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