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Modelling couplings among the oscillators of the cardiovascular system.

Stefanovska, Aneta and Luchinsky, D. G. and McClintock, Peter V. E. (2001) Modelling couplings among the oscillators of the cardiovascular system. Physiological Measurement, 22 (3). pp. 551-564. ISSN 0967-3334

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Abstract

A mathematical model of the cardiovascular system is simulated numerically. The basic unit in the model is an oscillator that possesses a structural stability and robustness motivated by physiological understanding and by the analysis of measured time series. Oscillators with linear couplings are found to reproduce the main characteristic features of the experimentally obtained spectra. To explain the variability of cardiac and respiratory frequencies, however, it is essential to take into account the rest of the system, i.e. to consider the eect of noise. It is found that the addition of noise also results in epochs of synchronization, as observed experimentally. Preliminary analysis suggests that there is a mixture of linear and parametric couplings, but that the linear coupling seems to dominate.

Item Type: Article
Journal or Publication Title: Physiological Measurement
Uncontrolled Keywords: nonlinear oscillators ; couplings modelling ; cardiovascular system ; blood flow ; blood pressure ; heart-rate variability ; nonlinear dynamics ; stochastic systems ; noise ; synchronization
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 31823
Deposited By: Professor P. V. E. McClintock
Deposited On: 19 Feb 2010 11:17
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 17:02
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/31823

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