粉样β沉积与双重任务步行表现之间的关联在健康的老年人中部分受到认知功能的缓解
Amgad Droby1,2,3, Mihir Kurkure4, Caleb R Haynes4
1Laboratory for Early Markers of Neurodegeneration (LEMON), Center for the Study of Movement, Cognition, and Mobility (CMCM), Neurological Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel. amgadd@tlvmc.gov.il.
Scientific reports
|December 24, 2025
概括
在特定的大脑区域的粉样蛋白β (Aβ) 沉积会影响老年人的步态规律和对称性. 诸如词汇和推理等认知功能可以防止这些影响.
科学领域:
- 神经科学是一个神经科学.
- 老年学是一门学科.
- 生物医学工程 生物医学工程
背景情况:
- 粉样β (Aβ) 沉积与衰老中的认知和运动障碍有关.
- 区域Aβ积累对步态和认知的特定影响,以及这种关系的认知调制,尚未完全理解.
研究的目的:
- 调查区域Aβ沉积,步行表现和健康老年人的认知功能之间的复杂关系.
- 为了确定认知功能是否能缓和健康衰老中Aβ负担和步态之间的关联.
主要方法:
- 33名健康的老年人接受了PiB-PET扫描,以量化Aβ,认知评估,并在通常行走 (UW) 和双重任务 (DT) 条件下进行步行评估.
- 层次回归和路径分析探索了区域Aβ,认知功能 (推理,词汇,记忆,处理速度) 和步行指标之间的关联.
- 统计模型根据年龄,性别和教育程度进行了调整,显著性值为p ≤0.05.
主要成果:
- 在白和内区域的Aβ升高与较差的步骤规律性 (UW) 相相关.
- 海马Aβ与较差的步骤对称性 (UW) 有关.
- 在DT行走过程中,小脑Aβ与步伐规律性降低有关,而小脑Aβ和大脑Aβ与较低的步骤对称性相关.
- 相反,环状和状Aβ与步态对称性积极相关.
- 在词汇和推理方面的认知得分在DT行走期间调节了Aβ-步态关系.
结论:
- 区域Aβ沉积不同地影响基于大脑区域和行走状况的特定步态指标.
- 认知表现,特别是在词汇和推理方面,可以缓和Aβ对步态的影响,这表明它起着保护作用.
- 研究结果强调了区域特异性病理和认知状态对于早期发现与年龄相关的运动和认知衰退的重要性.
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