Reflected Waves in an Inhomogeneous Excitable Medium
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چکیده
منابع مشابه
Reflected Waves in an Inhomogeneous Excitable Medium
Propagation can be encumbered in an excitable cable in which intrinsic properties change abruptly. A sudden increase in diameter or a decrease in conductivity or excitability can lead to propagation block or delay in propagation with or without reflection. We study such transient phenomena from a geometric point of view. A simple two-cell caricature, with one cell enlarged to mimic diameter inc...
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An excitable medium is a nonlinear dissipative dynamical system able to sustain undamped wave propagation. Examples of excitable media include cardiac tissue and neural media. This thesis investigates a class of novel dynamical phenomena in excitable media, known collectively as oscillatory waves. The examples of oscillatory waves considered here are Tango waves, breathers and pulse generators....
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We study numerically the dynamics of a scroll wave in a three-dimensional (3D) excitable medium in the presence of substantial meandering of the corresponding 2D spiral wave in the Aliev-Panfilov model. We identify three types of dynamics of the scroll wave filament--quasi-2D, periodic, and aperiodic meandering--and we study their dependence on parameter settings and thickness of the medium.
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Although the exact details are disputed, it is well established that propagating waves of increased intracellular free Ca2+ concentration arise from a positive feedback or autocatalytic mechanism whereby Ca2+ stimulates its own release. Most previous modeling of the propagation of Ca2+ waves has assumed that the sites of autocatalytic Ca2+ release, the activation sites, are homogeneously distri...
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3. S. E. Kayser and E. J. Majer, J. Geophys. Res., 83, 2533 (1978). 4. A. J. Dessler, J. Geophys. Res., 6-3, 507 (1958). 5~ D. G. Singleton, in: Spread F and Its Effects on Radiowave Propagation and Communication, W. and J. Mackey and Co., London and Chartman (1966), p. 553. 6. T. J. Elkins and M. D. Papagianis, J. Geophys. Res., 74, 4105 (1969). 7. V. Yu. Trakhtengerts and A. Ya. Fel'dshtein, ...
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ژورنال
عنوان ژورنال: SIAM Journal on Applied Mathematics
سال: 1996
ISSN: 0036-1399,1095-712X
DOI: 10.1137/s0036139994276793