大脑和脑脊液在太空飞行后的3D质量中心转移
Katherine G Warthen1, Stuart H Sater1, Larry A Kramer2
1Alcyone Therapeutics Inc, Lowell, MA, USA.
NPJ microgravity
|May 7, 2025
概括
长时间的太空飞行会导致头骨内的大脑组织和脑脊液发生显著的变化. 这些变化与太空飞行相关的神经眼综合征 (SANS) 和在无重量状态下向前流体转移有关.
科学领域:
- 神经科学是一个神经科学.
- 太空医学 太空医学
- 医疗成像医学成像
背景情况:
- 太空飞行相关的神经眼综合征 (SANS) 影响了长期任务上的宇航员.
- 在微重力中向前的流体移动被假定会导致SANS.
- 之前的研究观察到飞行后的大脑组织转移和脑脊液 (CSF) 重新分配,但缺乏充分的量化.
研究的目的:
- 开发和应用自动化方法来量化大脑组织和外轴性CSF3D质量中心移动的数量.
- 为了研究长时间太空飞行对内液和组织分布的影响.
- 为了将这些变化与太空飞行相关的神经眼神综合征 (SANS) 相关联.
主要方法:
- 利用宇航员 (N=13) 和对照组 (N=10) 的MRI数据.
- 脑组织和头骨内的外轴性CSF的3D质量转移中心的自动定量.
- 沿Gx,Gy和Gz轴 (前/后,左/右,下/上) 进行计算的移动.
主要成果:
- 宇航员在整个大脑组织中呈现出统计学上显著的上部移位 (+ 0.74 ± 0.28毫米,p < 0.0001).
- 在宇航员 (-2.45 ± 0.99 毫米,p < 0.0001) 中观察到与此同时发生的外轴性脑脊液的下部移位.
- 在对照组中没有检测到显著的Gz转移,这表明太空飞行是原因.
结论:
- 持续暴露于无重量状态会导致内液体和组织的位置发生可测量的变化.
- 观察到的大脑和脑脊液的变化提供了量化证据,支持SANS中向前流体转移假设.
- 这些发现对于了解和减轻宇航员在太空探索期间的SANS至关重要.
相关概念视频
Cerebrospinal Fluid
1.5K
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....
1.5K
Center of Mass
1.1K
The center of mass is the point at which the total mass of an object can be said to be concentrated. It is a fundamental principle in mechanics and physics that applies to all objects regardless of their shape or size. The center of gravity is the point at which an object’s weight appears to be concentrated and can be used to balance the object perfectly.
The knowledge of the center of mass can also help us to describe and predict the motion of objects. For example, when a ball is thrown...
The knowledge of the center of mass can also help us to describe and predict the motion of objects. For example, when a ball is thrown...
1.1K
Center of Gravity
1.4K
The center of gravity is the point at which an object's weight appears to be concentrated and can be used to balance the object perfectly. This point is essential in mechanics as it provides information regarding a body's stability and moments of inertia. The center of gravity does not always have to fall within the shape or boundaries of the body; it may also lie outside the body in certain cases.
To determine its location, the principle of moments can be utilized by dividing the...
To determine its location, the principle of moments can be utilized by dividing the...
1.4K
Center of Mass: Introduction
13.2K
Any object that obeys Newton's second law of motion is made up of a large number of infinitesimally small particles. Objects in motion can be as simple as atoms or as complex as gymnasts performing in the Olympics. The motion of such objects is described about a point called the center of mass of the object. The center of mass of an object is a point that acts as if the whole mass is concentrated at that point. The center of mass of an object with a large number of infinitesimally small...
13.2K
Finding the Center of Gravity
3.3K
The center of gravity of a body is an imaginary point where the body's total weight is assumed to be concentrated, and the body is perfectly balanced. The center of the mass of a body is a point at which the whole of the mass of the body appears to be concentrated. If the acceleration due to gravity, g, has the same value at all points on a body, its center of gravity is identical to its center of mass. The center of gravity of homogeneous bodies such as a sphere, cube, or rectangular plate...
3.3K
Significance of Center of Mass
6.1K
The center of mass of an object is defined as the mass-weighted average position of all the particles that comprise the object. The significance of the center of mass of an object can be seen by looking at its dynamics. The time derivative of the center of mass gives its velocity, assuming that the object's mass remains constant over time. Furthermore, the total linear momentum of an object can be seen as the linear momentum of a single particle of the object's total mass moving with...
6.1K


