Book ChapterDOI
Variation of lateral ventricular volume during the cardiac cycle observed by MR imaging.
TLDR
Variation in the size of the cerebral ventricles during the cardiac cycle suggests that the choroid plexus may play a greater role as a source of CSF pulsation that currently is acknowledged.Abstract:
CSF pulsation suggests variation in the size of the cerebral ventricles during the cardiac cycle. The arterial blood flow and venous outflow are two major components that contribute to the variation. High-resolution MR imaging with cardiac gating provides sharp delineation of the cerebral ventricles with clear boundaries. Subtle changes in the size of the ventricles during the cardiac cycle are measurable with high precision and accuracy by using a sophisticated automated edge-detection algorithm. In 12 normal individuals, the cerebral ventricles were examined, and the size of the lateral ventricles showed a 10–20% change during the cardiac cycle. The pattern is complex but similar in appearance to the intracranial pressure pulse waveform. The variation suggests that the choroid plexus may play a greater role as a source of CSF pulsation than currently acknowledged.read more
Citations
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Journal ArticleDOI
Pulsatile cerebrospinal fluid dynamics in the human brain
Andreas A. Linninger,C. Tsakiris,D.C. Zhu,Michalis Xenos,P. Roycewicz,Zachary C. Danziger,Richard D. Penn +6 more
TL;DR: A new model based on the first principles of fluid mechanics predicts flows and pressures throughout the brain's ventricular pathways consistent with both animal intracranial pressure measurements and human CINE phase-contrast magnetic resonance imaging data.
Journal ArticleDOI
Cerebral water transport using multiple-network poroelastic theory: application to normal pressure hydrocephalus
Brett Tully,Yiannis Ventikos +1 more
TL;DR: Results show that a breakdown in the transport mechanisms between the arterial vascular network and interstitial space within the parenchyma may be a cause of accumulation of CSF in the ventricles.
Journal ArticleDOI
Temporal and spatial assessment of normal cerebrospinal fluid dynamics with MR imaging.
TL;DR: In this article, the authors measured normal cerebrospinal fluid (CSF) pulsations within the intracranial and upper cervical subarachnoid spaces and the ventricular system.
Journal ArticleDOI
Dynamics of lateral ventricle and cerebrospinal fluid in normal and hydrocephalic brains.
TL;DR: To develop quantitative MRI techniques to measure, model, and visualize cerebrospinal fluid (CSF) hydrodynamics in normal subjects and hydrocephalic patients.
Journal ArticleDOI
In vivo measurement of volumetric strain in the human brain induced by arterial pulsation and harmonic waves
Sebastian Hirsch,Dieter Klatt,Florian Baptist Freimann,Michael Scheel,Jürgen Braun,Ingolf Sack +5 more
TL;DR: This pilot study provides the background for compression‐sensitive magnetic resonance imaging with or without external head stimulation for volumetric strain measurement and demonstrated that the compressibility of brain tissue at 25 Hz stimulation is much higher than that of water.
References
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Journal ArticleDOI
Human brain motion and cerebrospinal fluid circulation demonstrated with MR velocity imaging.
TL;DR: Observations of pulsatile brain motion, ejection of CSF out of the cerebral ventricles, and simultaneous reversal ofCSF flow direction in the basal cisterns toward the spinal canal suggest that a vascular-driven movement of the entire brain may be directly pumping the CSF circulation.
Journal ArticleDOI
Further investigations on pulsatile movements in the cerebrospinal fluid pathways.
TL;DR: The present findings throw light upon the CSF circulation and possibly, as will be reported separately, upon the aetiology of hydromyelia, some forms of hydrocephalus and of arachnoid cysts.
Journal ArticleDOI
Brain elasticity changes with ventriculomegaly
TL;DR: The pressure-volume relationship of brain elasticity was determined in 32 patients during servo-controlled variable-rate lumbar infusions to measure net cerebrospinal fluid (CSF) absorptive capacity to show a linear relationship between ventricular size and the elasticity slope which relates the natural logarithm of pressure to volume.
Journal ArticleDOI
Cerebrospinal fluid pressure and pulsatility. An experimental study of circulatory and respiratory influences in normal and hydrocephalic dogs.
Journal ArticleDOI
Circulation of cerebrospinal fluid in the spinal region of the cat.
TL;DR: The movements of a marker dye in the spinal subarachnoid space of the prone horizontal anaesthetized cat have been compared with those occurring in a glass model and the effects of tilting or shaking the animal have been studied and also the effect of picrotoxin convulsions.