在认知衰退中的海马体子场脆弱性和功能连接:帕金森病和轻度认知障碍之间的比较
Na Wang1, ChengLing Xu1, XueLing Liu1
1Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China.
Clinical neuroradiology
|May 5, 2025
概括
带有轻度认知障碍的帕金森病 (PD-MCI) 显示海马缩和连接性改变. 不指定的MCI (U-MCI) 具有较轻的缩,表明不同的疾病途径.
科学领域:
- 神经科学是一个神经科学.
- 神经学 神经学
- 放射学 放射学是一门学科.
背景情况:
- 认知障碍在帕金森病 (PD) 中很常见.
- 了解PD与正常认知 (PD-NC),PD与轻度认知障碍 (PD-MCI) 和未指定的MCI (U-MCI) 的海马变化至关重要.
研究的目的:
- 在PD-NC,PD-MCI和U-MCI组中比较海马体子场缩和功能连接 (FC) 改变.
- 在这些条件下识别共享和独特的神经成像标记物.
主要方法:
- 包括294名参与者,30名PD-NC,86名PD-MCI,76名U-MCI和102名健康对照 (HC).
- 使用MRI分析海马子的子场体积.
- 计算基于种子的FC来评估海马和皮质区域之间的连接性.
主要成果:
- 与HC相比,PD-NC显示右CA2/3,GC-DG和CA4子场的缩.
- 在这些子领域中,PD-MCI表现出双边缩,并且增加了与后置默认模式网络 (pDMN) 和视觉皮层的FC.
- 与U-MCI相比,U-MCI减少了右CA4体积;与U-MCI相比,PD-MCI显示海马视觉网络FC减少.
结论:
- 患有PD-MCI的特征在于,在特定的海马子区 (CA2/3,GC-DG,CA4) 的结构性脆弱性,以及与pDMN和视觉网络的改变FC.
- 与PD-MCI相比,U-MCI中明显的缩和连接模式表明了不同的进展机制.
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