老化的人类大脑在睡眠期间表现出脑脊液流量减少,这是由于神经和血管因素
Sydney M Bailes1,2, Stephanie D Williams1,3, Baarbod Ashenagar1,2
1Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA.
bioRxiv : the preprint server for biology
|March 10, 2025
概括
老年人在睡眠期间经历脑脊液 (CSF) 流量减少,影响大脑废物清除. 这种与年龄相关的CSF循环下降与神经血管变化和大脑缩有关.
科学领域:
- 神经科学是一个神经科学.
- 衰老研究研究 衰老研究
- 睡眠科学 睡眠科学
背景情况:
- 睡眠质量和数量随着年龄的增长而下降,与认知衰退和神经退行相关.
- 脑脊液 (CSF) 循环对于脑部废物清除至关重要,在年轻人NREM睡眠期间观察到的最大流量.
- 由于睡眠期间的技术成像挑战,睡眠依赖的CSF生理学的与年龄相关的变化在很大程度上是未知的.
研究的目的:
- 为了研究睡眠依赖性脑脊液 (CSF) 动态的与年龄相关的变化.
- 为了确定神经血管机制背后的变化,在CSF流与衰老.
- 确定脑脊液流量减少与与年龄相关的大脑结构变化之间的关联.
主要方法:
- 同时的快速功能性MRI (fMRI) 和电脑电图 (EEG) 用于测量年轻人和老年人的夜间睡眠期间的CSF流量.
- 在白天的任务中使用感官和血管活性刺激来探测CSF流动机制.
- 灰质体积被评估以评估与年龄相关的结构变化.
主要成果:
- 与年轻人相比,老年人表现出明显减少的睡眠依赖的CSF流量.
- 老年人中中枢液流量减少与前脑电图三角电源减弱和睡眠期间的全球血液动力学振荡有关.
- 发现神经和脑血管的生理变化都会导致睡眠期间脑脊液流量受损.
- 睡眠期间CSF流量的减少与衰老中的灰质缩相关.
结论:
- 衰老与人类大脑中睡眠依赖的CSF流量显著减少有关.
- 神经血管机制,包括神经和脑血管变化,是脑脊髓液循环与年龄相关的下降的基础.
- 睡眠期间CSF流量减少可能是导致与年龄相关的认知衰退和大脑缩的因素,这表明潜在的治疗点.
相关概念视频
Cerebrospinal Fluid
1.7K
Cerebrospinal fluid (CSF) is a colorless liquid that flows around the brain and the spinal cord, playing a vital role in the protection, support, and overall function of the central nervous system (CNS). CSF production, circulation, and absorption are tightly regulated processes essential for the brain and spinal cord to function properly.
CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain....
CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain....
1.7K
Sleep-Wake Cycles
1.2K
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:
1.2K
Understanding Sleep
214
Sleep, an essential biological state, involves significant reductions in physical activity, sensory awareness, and interaction with the environment. This complex physiological process is primarily regulated by specific brain regions, notably the hypothalamus and pons, which govern the sleep-wake cycle or circadian rhythm.
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
The circadian rhythm, a nearly 24-hour cycle, is deeply influenced by environmental light cues. Light exposure directly affects the hypothalamus, which in turn regulates...
214
Anatomy of the Brain: Ventricles
2.9K
There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen.
2.9K
The Blood-brain Barrier
46.5K
Overview
46.5K
Neural Regulation of Blood Pressure
2.6K
The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
2.6K


