在衰老过程中自主生理学的功能性MRI特征
Jiawen Fan1, Meher R Juttukonda1,2, Sarah E Goodale3
1Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Boston, MA, USA.
Communications biology
|August 26, 2025
概括
在fMRI信号中观察到呼吸速度减慢和心脏反应加快. 这些变化,特别是在60岁以后,突显了血管健康和自主功能下降对老年大脑的影响.
科学领域:
- 神经成像
- 人类生理学
- 老年学
背景情况:
- 功能磁共振成像 (fMRI) 波动通常被认为是噪音.
- 然而,这些与全身生理学 (心率,呼吸) 相关的信号提供了对大脑血管特性和自主功能的洞察.
研究的目的:
- 使用生理fMRI信号调查与年龄相关的大脑生理变化.
- 描述衰老如何影响大脑血管特性和自主功能.
主要方法:
- 使用了来自生命周期人类结合体项目衰老研究的大数据集.
- 分析休息状态的fMRI数据以提取多参数的生理信息.
- 研究了年龄对呼吸和心脏fMRI反应及其合的影响.
主要成果:
- 衰老与全球慢呼吸fMRI反应和更快的心脏fMRI反应有关.
- 随着年龄的增长,观察到大脑与心脏信号的合增强.
- 年龄对生理fMRI信号的影响的一个重要转折点是在60岁之后发现的.
结论:
- 衰老显著改变了全身生理学的fMRI特征,
- 休息状态的fMRI是评估大脑生理学的宝贵工具,
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