Age Related Peculiarities of Ratio of Parameters of Functioning of Hemo and Liquorodynamics Systems

05/11/2010

in Beckley Science in the Media,BF Policy Publications - Intro,BF Scientific Publications

Abstract—For the last decade, owing to methods of computerized neuroradiology, it has been established that the process of the human organism natural aging is accompanied by a gradual atrophic reduction of the brain tissue volume and a decrease of the cerebral blood flow level, while the intracranial cerebrospinal fluid volume increases. The goal of the present study was to elucidate functional significance of the above changes in terms of interaction of intracranial hemo and liquorocirculation systems at various stages of ontogenesis of practically healthy people. The total of 122 people aged from 6 to 100 years were examined at rest and during performance of goal oriented functional physiological tests with simultaneous continuous recording of parameters of cerebral blood flow and liquorodynamics by methods of transcranial dopplerography and rheoencephalography. The obtained data are processed by means of the pattern and phasic two dimensional analysis with use of special computer programs. In the same age groups, the brain neurophysiological activity was evaluated by applying special psychological tests. It has been shown that with age, on the back ground of a decrease of hemodynamic parameters of cerebral blood supply, there is observed an enhancement of the liquorodynamic factor of cerebral blood circulation due to an increase of the liquor volume and facilitation of its translocation in the single craniospinal cavity. The enhancement of the liquordependent mechanism of compensation of intracranial pulse oscillations of the blood volume is particularly expressed both in children and in elderly people due to a relatively high liquor volume. Owing to the improvement of intracranial liquorodynamic processes, the change of the cerebral blood circulation is compensated, which is confirmed by results of performed psychophysiological studies. © Pleiades Publishing FULL DOC: http://archive.beckleyfoundation.org/bib/doc/bf/2006_Yu_211310_1.pdf

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