衰老会影响大脑氧化和神经活动中自发振荡之间的相连贯性
Juliane Bjerkan1, Gemma Lancaster1, Bernard Meglič2
1Lancaster University, Department of Physics, LA1 4YB, Lancaster, United Kingdom.
Brain research bulletin
|July 14, 2023
概括
健康的衰老表明神经血管合减少,影响大脑健康. 这项研究量化了大脑氧化和电活动相互作用与年龄的变化.
科学领域:
- 神经科学是一个神经科学.
- 生物医学工程 生物医学工程
- 老年学是一门学科.
背景情况:
- 老龄化增加了神经退行性疾病的风险,原因是神经功能受损和血管供应.
- 了解神经血管合的与年龄相关的变化对于识别认知衰退的早期标志物至关重要.
- 目前关于健康衰老期间大脑心血管相互作用的演变的知识仍然有限.
研究的目的:
- 研究大脑氧化和神经活动之间的相互作用的与年龄相关的演变.
- 评估心血管动力学如何影响年轻人与老年人的神经血管合.
- 建立一种非侵入性方法来评估神经血管单元在衰老中的效率.
主要方法:
- 功能近红外光谱 (fNIRS) 的同时记录用于大脑氧化,脑电图 (EEG) 用于神经活动,心电图 (ECG) 与呼吸用于心血管功能.
- 分析使用波波变换和波波相连贯度来量化自发振荡 (0.0074 Hz) 之间的相互作用.
- 21名年轻人 (平均年龄为31.1岁) 和24名老年人 (平均年龄为64.9岁) 在休息状态下相位一致性的比较.
主要成果:
- 在许多fNIRS-EEG组合中,在老年人中观察到神经和氧化振荡 (大约0.1Hz) 之间的相一致性显著减少.
- 观察到的连贯性下降是独立于信号功率的,这表明神经血管相互作用的真正变化,而不仅仅是信号衰减.
- 这些发现突显了神经血管单元协调功能中的年龄相关变化.
结论:
- 神经血管相互作用,特别是大脑活动和氧化之间的合,在健康的衰老过程中发生显著变化.
- 开发的非侵入性方法为评估神经血管单元在老年人群中的效率提供了一个有希望的工具.
- 这项研究为与年龄相关的变化提供了洞察力,这些变化可能会使个人倾向于神经退行性疾病.
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