临床表现 临床表现
Aryan Verma1,2, Junyeon Won2,3, Tsubasa Tomoto2,3
1University of Texas at Dallas, Richardson, TX, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
升高的动脉硬性可能会通过改变大脑连接来恶化轻度认知障碍的认知功能. 解决血管健康问题对于预防老年人群认知能力下降至关重要.
科学领域:
- 神经科学是一个神经科学.
- 心脏病学 心脏病学
- 老年学是一门学科.
背景情况:
- 升高的中央动脉硬度是已知的麻性轻度认知障碍 (aMCI) 和痴呆症的风险因素.
- 在aMCI患者中,血管健康与认知衰退的确切机制尚未完全理解.
研究的目的:
- 研究中枢动脉硬,默认模式网络功能连接 (DMN-FC) 和MCI患者的认知功能之间的关系.
- 探索DMN-FC在动脉硬与认知障碍之间的关联中的潜在调解作用.
主要方法:
- 涉及认知正常成年人和被诊断患有aMCI (年龄在55-80岁) 的患者的横截面研究.
- 中枢动脉硬度用心血管 - 骨脉冲波速率 (cfPWV) 和心血管β-硬度指数进行测量.
- 默认模式网络功能连接 (DMN-FC) 通过静止状态fMRI进行评估,后带皮质 (PCC) 作为种子.
- 使用加利福尼亚语言学习测试 (CVLT) 和威斯康星卡片排序测试 (WCST) 评估认知功能.
主要成果:
- 在aMCI组中,较高的动脉β度指数与CVLT和WCST的表现较差有关.
- 在PCC和右前中心 (PcG) 之间增加的DMN-FC与aMCI患者的CVLT得分较差相关.
- 在PCC和右PCG之间的DMN-FC显著调解了aMCI组中较高的动脉β度指数和受损的CVLT性能之间的联系.
结论:
- 中枢动脉硬度升高可能会通过改变DMN功能连接而对aMCI患者的认知表现产生负面影响.
- 这些DMN变化可能代表了对血管变化的补偿机制.
- 保持血管健康对于预防或延缓认知衰退至关重要,特别是在老年人中,有痴呆风险.
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