Issue
EPL
Volume 85, Number 1, January 2009
Article Number 10002
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/85/10002
Published online 07 January 2009
EPL, 85 (2009) 10002
DOI: 10.1209/0295-5075/85/10002

On the space and time evolution of regular or irregular human heart or brain signals

Ç. Tuncay

Department of Physics, Middle East Technical University - 06531 Ankara, Turkey

calglart@metu.edu.tr

received 15 May 2008; accepted in final form 24 November 2008; published January 2009
published online 7 January 2009

Abstract
A coupled map is suggested to investigate various spatial or temporal designs in biology: several cells (or tissues) in an organ are considered as connected to each other in terms of some molecular diffusions or electrical potential differences and so on. The biological systems (groups of cells) start from various initial conditions for spatial designs (or initial signals for temporal designs) and they evolve in time in terms of the mentioned interactions (connections) besides some individual feedings. The basic aim of the present contribution is to mimic various empirical data for the heart (in normal, quasi-stable, unstable and post operative physiological conditions) or brain (regular or irregular; for epilepsy) signals. The mentioned empirical data are borrowed from various works in the literature which are cited. The suggested model (to be used besides or instead of the artificial network models) involves simple mathematics and the related software is easy. The results may be considered as in good agreement with the mentioned real signals.

PACS
05.45.Ra - Coupled map lattices.
02.50.-r - Probability theory, stochastic processes, and statistics.
05.10.-a - Computational methods in statistical physics and nonlinear dynamics.

© EPLA 2009