Nonlinear dynamics of the blood flow studied by Lyapunov exponents

被引：24
|
作者：
Bracic, M [1 ]
Stefanovska, A [1 ]
机构：
[1] Univ Ljubljana, Fac Elect Engn, Lab Nonlinear Dynam & Synerget, Ljubljana, Slovenia
来源：
BULLETIN OF MATHEMATICAL BIOLOGY | 1998年 / 60卷 / 03期
关键词：
D O I：
10.1006/bulm.1997.0007
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
In order to gain an insight into the dynamics of the cardiovascular system throughout which the blood circulates, the signals measured from peripheral blood flow in humans were analyzed by calculating the Lyapunov exponents. Over a wide range of algorithm parameters, paired values of both the global and the local Lyapunov exponents were obtained, and at least one exponent equaled zero within the calculation error. This may be an indication of the deterministic nature and finite number of degrees of freedom of the cardiovascular system governing the blood-flow dynamics on a time scale of minutes. A difference was observed in the Lyapunov dimension of controls and athletes. (C) 1998 Society for Mathematical Biology.
引用
收藏
页码：417 / 433
页数：17
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