在视神经下arachnoid空间内的CSF动态的大规模in-silico分析
Diego Rossinelli1, Gilles Fourestey2, Hanspeter Esriel Killer3
1Institute for Computational and Mathematical Engineering (ICME), Center for Turbulence Research, Stanford University, Stanford, CA, 94305-3024, USA. rossinel@stanford.edu.
Fluids and barriers of the CNS
|February 28, 2024
概括
计算流体动力学揭示了光神经下关节空间 (ONSAS) 架构优化脑脊液 (CSF) 动力学和质量转移. 在ONSAS结构的变化影响CSF体积和排水,可能解释神经退行性疾病的病理.
科学领域:
- 神经科学是一个神经科学.
- 生物物理学的生物物理.
- 计算生物学 计算生物学
背景情况:
- 大脑脊髓液 (CSF) 动态与影响中枢神经系统和视神经 (ON) 的神经退行性疾病有关.
- 视神经下关节空间 (ONSAS) 具有复杂的结构,使得CSF动态的测量变得复杂.
- 在疾病期间,ONSAS中的结构变化对CSF流量的影响尚不清楚.
研究的目的:
- 通过计算流体动力学 (CFD) 来研究ONSAS内部的CSF动态.
- 分析CSF流向对ONSAS结构变化的反应.
- 了解ONSAS几何在质量转移中的作用及其对神经退行性疾病的影响.
主要方法:
- 使用计算流体动力学 (CFD) 进行大规模的in-silico调查.
- 在1.625μm/像素分辨率的ONSAS几何上进行高级直接数值模拟 (DNS).
- 检查ONSAS微观结构的形态变化与CSF压力梯度 (CSFPG) 和壁张率的关系.
主要成果:
- 在0.37-0.67Pa/mm的水静压梯度下,达到0.5mm/s的生理流速.
- 与更简单的几何形状相比,ONSAS微观结构展示了优越的质量转移能力.
- 在ONSAS内部的椎间板结构被确定为有效的质量转移的关键.
结论:
- 超过4厘米的0.1-0.2mmHg的压力下降足以通过ONSAS.驱动稳定的CSF流通过ONSAS.
- 尽管液压阻力较低,但流量异质性可能导致某些ONSAS区域的停滞.
- 本土的ONSAS架构,特别是它的轨道,似乎针对最大质量转移进行了优化,这表明它在预防神经退行性损伤方面的作用.
相关概念视频
Cranial and Spinal Meninges
The cranial and spinal meninges are complex protective structures surrounding the central nervous system (CNS), consisting of the brain and spinal cord. These meninges consist of the dura mater, the arachnoid mater, and the pia mater. They protect the CNS, provide structural support, and aid in circulating cerebrospinal fluid (CSF).
Cranial Meninges
These meningeal layers cover the cranium. The dura mater is the outermost layer of cranial meninges. It is a thick and durable membrane of dense...
Cranial Meninges
These meningeal layers cover the cranium. The dura mater is the outermost layer of cranial meninges. It is a thick and durable membrane of dense...
Cerebrospinal Fluid
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.


