改变自我调节的概念:对"人类的静态自我调节"的评论
1Radboud University Medical Center, Department of Geriatrics Nijmegen, the Netherlands.
概括
现代成像显示脑血流 (CBF) 异常不稳定,与较旧的方法显示稳定性形成鲜明对比. 这篇评论协调了这些关于大脑自我调节的不同观察.
科学领域:
- 神经科学是一个神经科学.
- 身体生理学 身体生理学
- 医疗成像医学成像
背景情况:
- 大脑自调节维持稳定的脑血流 (CBF),尽管血压波动.
- 从历史上看,CBF在10-20分钟间隔内测量,显示出显著的稳定性.
- 最近的进步允许节奏到节奏的CBF监控.
研究的目的:
- 为了调和CBF稳定性和不稳定性的看似矛盾的发现.
- 讨论先进成像对理解大脑自我调节的影响.
主要方法:
- 历史和现代脑血流 (CBF) 测量技术的审查.
- 从较旧的成像方法 (10-20分钟的平均值) 分析数据.
- 分析来自现代,节奏到节奏的CBF成像技术的数据.
主要成果:
- 较旧的技术表明CBF在广泛的血压范围内稳定.
- 现代技术揭示了矛盾的,节奏到节奏的CBF不稳定性.
- 差异源于测量技术的时间分辨率.
结论:
- 观察到的CBF稳定性的差异是测量时间表的工件.
- 现代高分辨率成像为大脑自我调节提供了更动态的视图.
- 调和需要考虑CBF监管的时间动态.
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