无症状大脑管狭窄症中自发大脑活动的频率结构改变:基于波形波形的静止状态fMRI研究
Wei Xue1,2, Zongyuan Qin2, Xiaoli Zhong3
1Department of Radiology, The Second Hospital of Tianjin Medical University, Tianjin, China.
Frontiers in neurology
|February 9, 2026
概括
严重无症状大脑管狭窄症 (SACS) 通过破坏大脑活动模式,损害认知能力. 患者在默认模式网络 (DMN) 中表现出异常的低频波动和交叉频率合,影响大脑功能.
科学领域:
- 神经科学是一个神经科学.
- 医疗成像医学成像
- 脑血管疾病研究研究
背景情况:
- 休息状态fMRI (rs-fMRI) 通过同步的神经振荡揭示了内在的大脑活动.
- 特定频率的大脑活动模式与认知功能有关,但在脑血管疾病中人们对其了解甚少.
- 慢性闭塞性脑血管疾病可能导致认知障碍.
研究的目的:
- 研究严重无症状大脑管狭窄症 (SACS) 患者大脑活动的交叉频率结构.
- 了解频率特定的时空模式的变化如何与SACS认知障碍有关.
- 探索默认模式网络 (DMN) 在与SACS相关的认知缺陷中的作用.
主要方法:
- 在rs-fMRI数据上利用低频波动 (wavelet-ALFF) 波形变换振幅分析.
- 在健康对照组和SACS患者中检查波形-ALFF的频率特定空间分布.
- 进行了时空分解分析,以评估DMN内的交叉频率合.
主要成果:
- 健康对照组显示波形-ALFF的空间分布从较低的频率到更高的频率,按照功能层次.
- 在SACS患者中,在前中介DMN (较低频率) 和后中介DMN (较高频率) 中,波段-ALFF呈现下降.
- 在SACS患者中发现了DMN内的异常交叉频率合.
结论:
- 在SACS的认知障碍与DMN内脑活动的频率特定变化有关.
- 在DMN中的空间时间异常的交叉频率相互作用是这些认知缺陷的基础.
- 这些发现增强了对SACS和潜在的其他神经疾病中大脑网络功能障碍的理解.
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