生物标志物 生物标志物
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
高海拔低氧会加剧轻度认知障碍 (MCI) 和阿尔茨海默病 (AD) 中的大脑变化. 结构和功能性大脑恶化与记忆,语言和视觉空间能力的认知衰退相关.
科学领域:
- 神经成像是一种神经成像.
- 认知神经科学 认知神经科学
- 高海拔医学 高海拔医学
背景情况:
- 轻度认知障碍 (MCI) 和阿尔茨海默病 (AD) 在高海拔低氧环境中存在独特的挑战.
- 了解这些条件下的大脑结构和功能变化对于有效管理至关重要.
研究的目的:
- 在居住在高海拔地区的正常认知 (NC),MCI和AD个体中调查大脑成像特征.
- 为了将这些神经成像发现与多个认知领域的表现相关联.
主要方法:
- 使用了结构磁共振成像 (sMRI) 和静止状态功能性MRI.
- 基于Voxel的形态测量 (VBM) 和基于表面的形态测量 (SBM) 分析了灰色物质的体积和厚度.
- 大脑网络的功能连接模式使用ALFF,fALFF和ReHo进行了评估.
主要成果:
- 与NC相比,MCI和AD组在脑内皮层和极等关键脑部区域的灰质体积和厚度下降.
- 灰质体积和皮质厚度与记忆,语言和视觉空间测试中的认知分数呈正相关.
- 观察到大脑网络功能连接的显著变化,特别是在腹部注意网络中,与认知功能相关.
结论:
- 低氧环境有助于从MCI到AD的渐进性大脑结构和功能恶化.
- 这些神经成像变化与全球认知,情节性记忆,语言和视觉空间功能的缺陷密切相关.
相关概念视频
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