在脑小血管疾病中发生的海马体子场宏观和微观结构变化,伴有轻微的认知障碍
Binglan Li1, Bang Zeng1, Peng Zeng1
1Department of Radiology, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.
Journal of affective disorders
|May 8, 2025
概括
大脑小血管疾病 (CSVD) 导致海马缩和微观结构变化,影响认知功能. 像NODDI这样的先进扩散模型有助于识别与认知衰退相关的海马体的早期病理变化.
科学领域:
- 神经成像是一种神经成像.
- 神经学 神经学
- 血管生物学 血管生物学
背景情况:
- 河马子区域易受血管损伤的影响,影响微观结构和宏观结构.
- 这种脆弱性将海马功能障碍与认知缺陷和抑郁症状联系起来.
- 大脑小血管疾病 (CSVD) 与显著的海马体微观结构和宏观结构变化有关.
研究的目的:
- 在CSVD患者中研究海马子区域的微观结构和体积变化.
- 将这些变化与认知功能相关联.
- 探索先进的扩散模型在评估这些变化的有用性.
主要方法:
- 评估了169名参与者,分为轻度认知障碍 (MCI) 的CSVD,没有认知障碍 (NCI) 的CSVD和健康对照.
- 进行了神经成像和神经心理评估.
- 神经元定向分散和密度成像 (NODDI) 模型分析了海马亚区域特征.
主要成果:
- 在CSVD患者中,显著的海马缩和微观结构异常,特别是在cornu ammonis (CA) 和dentate gyrus (DG) 中.
- 定向分散指数 (ODI) 和自由水 (FISO) 度量显示了群体之间的显著差异,与认知表现相关.
- 与体积分析相比,FISO指标对早期认知衰退更为敏感.
结论:
- 海马在与CSVD相关的认知衰退中至关重要.
- NODDI提供了跨认知阶段的病理相关信息,有助于早期识别CSVD相关的认知障碍.
- 缺少痴呆症队列,限制了对渐进性病理变化的洞察力.
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