Neuroendoscopy and Mathematical Model of Dynamics of Cerebral Ventricles


Authors: Z. Novák
Authors‘ workplace: Neurochirurgická klinika LF MU a FN u sv. Anny, Brno
Published in: Cesk Slov Neurol N 2007; 70/103(1): 85-87
Category: Short Communication

Podporováno grantem IGA MZ ČR NR/7805-2.

Overview

During an endoscopic surgery for a uni-ventricular hydrocephalus, a membranous lobe of chorioidal plexus appeared within the intraventricular opening that, as a safety valve, controlled by turns the liquor flow through Monro´s foramen. This observation became the base for constructing a proper mathematical model.

It resulted in the original knowledge that the liquor motion is of two different types of nature: a slow continuous motion and much faster flutter among three upper ventricles: two lateral ones and the third ventricle connected with them.

Biological importance of this motion probably consists in the fact that it absorbs pulsatory rushes of blood into the brain thus securing the optimal environment for the nervous system. This may be the main function of the liquor space within the head.

Key-words:
Safe-valve phenomenon, endoscopic observations, mathematical model, liquor flutter


Sources

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2. Hakim S, Venegas JG, Burton JD. The physics of the cranial cavity, hydrocephalus and normal pressure hydrocephalus: mechanical interpretation and mathematical model. Surg Neurol 1976; 5(3): 187-210.

3. Nagashima T, Tamaki N, Matsumoto SB, Seguchi Y. Biomechanics of hydrocephalus: a new theoretical model. Neurosurgery 1987; 21 (6): 894-904.

4. Kaczmarek M, Subramaniam RP, Neff SR. The hydromechanics of hydrocephalus: steady state solutions for cylindrical geometry. Bull Math Biol 1997; 59 (2):295-323.

5. Taylor Z, Miller K. Reassessment of brain elasticity for analysis of biomechanisms of hydrocephalus. J Biomech 2004; 37 (8): 1263-9.

6. Kosorin K. Matematický model tlakového a prietokového režimu v uzavretej sústave pružných komôr. J Hydrol Hydromech. In press.

Labels
Paediatric neurology Neurosurgery Neurology

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Czech and Slovak Neurology and Neurosurgery

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2007 Issue 1

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