大脑氧化代谢的睡眠阶段依赖的变化,通过磁共振量化
Jing Xu1, Andrew Wiemken2, Michael C Langham1
1Laboratory for Structural, Physiological, and Functional Imaging, Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Journal of neuroscience research
|February 28, 2024
概括
大脑新陈代谢,以大脑新陈代谢氧气速率 (CMRO2) 来衡量,随着深度睡眠阶段的下降. 这项研究使用先进的MRI技术量化了不同非REM睡眠阶段的CMRO2变化.
科学领域:
- 神经科学是一个神经科学.
- 睡眠科学 睡眠科学
- 医疗成像医学成像
背景情况:
- 睡眠对大脑健康至关重要,包括大脑新陈代谢减少.
- 了解睡眠阶段依赖的大脑能量对于维持认知功能至关重要.
- 以前的方法缺乏准确度,无法实时量化这些变化.
研究的目的:
- 量化大脑新陈代谢氧速率 (CMRO2) 的睡眠阶段相关变化.
- 使用定量磁共振成像 (MRI) 与并发电脑电图 (EEG) 进行精确测量.
- 建立睡眠深度和大脑氧气消耗之间的关系.
主要方法:
- 在22名健康的年轻人和老年人中使用定量MRI与并发EEG.
- 使用内部开发的OxFlow成像序列,同时测量脑血流 (CBF) 和静脉氧和度 (SvO2).
- 用Fick的原理计算全脑CMRO2的绝对单位,时间分辨率为2.7秒.
主要成果:
- 随着睡眠深度的增加,CMRO2显著下降.
- 平均CMRO2值为:清醒 (98 ± 7),N1 (94 ± 10.8),N2 (91 ± 11.4) 和N3 (76 ± 9.0微摩尔/分钟/100g).
- 与清醒相比,每个睡眠阶段都显示CMRO2的显著下降.
结论:
- 开发的MRI技术准确地以绝对单位量化大脑的氧化代谢.
- 大脑的氧气消耗与非REM睡眠的深度密切相关.
- 较深的睡眠阶段 (N3) 具有逐渐降低的CMRO2水平的特征,突出显示了它们的恢复作用.
更多相关视频
10:45Simultaneous Electroencephalography, Real-time Measurement of Lactate Concentration and Optogenetic Manipulation of Neuronal Activity in the Rodent Cerebral Cortex
Published on: December 19, 2012
20.3K
11:39Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
Published on: March 14, 2013
20.5K
相关概念视频
01:22Stages of Sleep
190
Sleep progresses through distinct stages, each characterized by specific brain wave patterns and physiological responses ranging from wakefulness to stages of non-rapid eye movement, known as non-REM, to rapid eye movement, referred to as REM. Understanding these stages helps in recognizing how sleep supports various bodily and cognitive functions.
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
Before sleep begins, in wakefulness, the brain exhibits primarily beta waves, which are high in frequency and low in amplitude, indicating alertness...
190
01:24Sleep-Wake Cycles
1.3K
Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
1.3K