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休息时自发性脑血管反应的年龄差异

Allison C Engstrom¹, Shubir Dutt², John Paul M Alitin³

¹Department of Psychological Science, Social and Behavioral Sciences Gateway, University of California, Irvine, 4201, Irvine, CA, 92697-7085, USA.

|October 30, 2025

概括

老年人与年轻人相比,休息时自发性脑血管反应率 (sCVR) 降低,即使没有认知障碍. 这表明sCVR可能标志着脑血管衰老和潜在的未来血管功能障碍.

科学领域:

神经科学是一个神经科学.
血管生物学血管生物学
衰老研究研究衰老研究

背景情况:

大脑血流 (CBF) 和脑血管反应 (CVR) 对大脑健康至关重要.
与年龄相关的CVR变化尚未完全理解,之前的研究发现的结果各不相同.
休息时的自发心血管回路 (sCVR) 尚未在不同年龄组进行研究.

研究的目的:

为了比较健康的年轻人和认知不受损的老年人之间的整个大脑和区域sCVR休息.
调查sCVR与年龄相关的差异及其与CBF可变性的关系.
确定sCVR是否可以在没有损伤的个体中表明大脑血管衰老.

主要方法:

在24名健康的年轻成年人 (18-34岁) 和163名没有认知障碍的老年人 (55-87岁) 中比较休息时的sCVR.
评估了整个大脑和区域sCVR.
分析了sCVR和脑血流 (CBF) 变异性的年龄差异.

主要成果:

与年轻人相比,老年人在整个大脑和区域休息时的sCVR中表现出显著的缺陷.
中间叶区域显示sCVR中与年龄相关的差异最为明显.
在sCVR和CBF变化中的年龄差异比平均CBF的差异更为显著.

结论:

与sCVR的年龄相关的缺陷存在于认知不受损的老年人中.
sCVR可以作为大脑血管衰老的指标.
对sCVR的进一步研究可能有助于早期发现与年龄相关的血管功能障碍.

关键词:

衰老的衰老衰老的衰老大脑的血液流动.大脑血管反应活性年龄较大的成年人.

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