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Related Concept Videos

Cerebrospinal Fluid01:21

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.
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Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
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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. The...
Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...
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Cerebral Edema l: Introduction01:19

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Cerebrospinal fluid flow dynamics in the central nervous system.

Brian Sweetman1, Andreas A Linninger

  • 1Laboratory for Product and Process Design (LPPD), Department of Bioengineering, University of Illinois at Chicago, Science and Engineering Offices (SEO), Room 218 (M/C 063), 851 S Morgan St., Chicago, IL 60607-7052, USA.

Annals of Biomedical Engineering
|August 26, 2010
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Summary

Researchers developed a 3D computational fluid dynamics model to simulate cerebrospinal fluid (CSF) flow in the central nervous system (CNS). The model accurately predicts CSF velocity, pressure gradients, and wave speed, offering insights into CNS hydrodynamics.

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Fluid Dynamics

Background:

  • Cerebrospinal fluid (CSF) dynamics are crucial for central nervous system (CNS) health.
  • Accurate modeling of CSF flow is essential for understanding neurological conditions.

Purpose of the Study:

  • To develop and validate a three-dimensional fluid-structure interaction (FSI) model of CSF flow within the CNS.
  • To compute CSF pressure gradients and amplitudes throughout the CNS.

Main Methods:

  • Cine-phase-contrast MRI was used to acquire 3D CSF flow data in a healthy subject.
  • Image reconstruction and grid generation tools were employed to create the FSI model.
  • The finite-element method and ADINA-FSI 8.6 software were used to solve fluid and solid motion equations.

Main Results:

  • Model predictions for CSF velocity magnitude and stroke volume closely matched experimental data.
  • Computed CSF pressure gradients and amplitudes aligned with clinical values.
  • The highest pressure amplitude (77 Pa) was predicted in the lateral ventricles, with a pressure gradient of ~132 Pa between ventricles and the lumbar region.

Conclusions:

  • The validated 3D FSI model provides a powerful tool for understanding CSF dynamics.
  • The model enables mechanistic insights into the interplay of vasculature pulsations, CSF flow, and pressure waves in the CNS.
  • This approach is a prerequisite for advancing our understanding of CNS fluid mechanics and related pathologies.