认知能力下降的指纹在健康衰老中的碎形连接动态上的指纹
Zalan Kaposzta1, Akos Czoch1, Peter Mukli1,2,3,4
1Department of Physiology, Semmelweis University, 37-47 Tuzolto Street, Budapest, 1094, Hungary.
GeroScience
|December 20, 2023
概括
健康的衰老表明动态分形连接 (dFrC) 减少,影响认知表现. 这项研究将老年人大脑连接模式的改变与缓慢的反应和较低的准确性联系在一起,这表明dFrC是认知衰退的生物标志物.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 数据科学数据科学数据科学
背景情况:
- 大脑功能连接 (FC) 分析提供了关于健康衰老 (HA) 期间认知衰退的见解.
- 老年人的动态功能连接 (DFC) 研究是有限的,特别是在认知表现方面.
- 之前的研究表明,HA中缩小了碎形时间缩放,可以预测认知缺陷.
研究的目的:
- 分析健康衰老中的动态碎形连接性 (dFrC) 变化.
- 研究dFrC与年轻人和老年人的认知表现之间的关系.
- 使用机器学习识别年龄歧视的dFrC模式.
主要方法:
- 分析了年轻和老年参与者的静止状态 (RS) 电脑电图 (EEG) 记录.
- 动态碎形连接性 (dFrC) 计算使用滑动窗节约交叉相关性分析 (DCCA).
- 机器学习 (递归特征消除) 用于识别歧视性连接和评估认知性能相关性.
主要成果:
- 在dFrC的分析中,发现了56个连接,分类年龄组,准确度高于92%.
- 老年人表现出平均DCCA的增加和碎形连接 (FrC) 的时间变异性降低.
- 与认知表现相关的dFrC指数,将改变的连接强度和变异与老年人的精度降低和延迟增加联系起来.
结论:
- 动态碎形连接模式在年轻人和老年人之间存在显著差异.
- 改变dFrC动态与与年龄相关的认知衰退有关,特别是影响反应延迟和准确性.
- dFrC可以作为潜在的认知衰老生物标志物和未来干预的目标.
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