The Peculiarity of A Nervous Pulse Propagation
Mileta Arakelyan,
Hakob Kanoyan
Issue:
Volume 1, Issue 1, February 2013
Pages:
1-5
Received:
14 February 2013
Accepted:
Published:
20 February 2013
Abstract: In the work, transmission of nerve impulses along nerve fibers is simulated. Research is being conducted in the framework of the electrical theory of propagation of the action potential. The soliton approach is used. The numerical experiment on the evolution of the nerve impulse and the laws of motion is conducted. It is shown that the stable form of nerve impulses solitons is realized under different initial conditions. The threshold character of occurrence of nerve pulse is simulated. It is shown that the number of pulses produced changes depending on the degree of nonlinearity: with strong initial excitation of large amplitude soliton is unstable; it breaks up into a multitude number of solitons with small ampli-tudes. In this case, the greater the nonlinearity parameter, the greater the number of births of solitons. Unusual solitonlike regimes of interaction of nonlinear pulses excitations are illustrated; in certain anomalies, colliding nerve impulses are re-flected instead of their usual quenching. The possibility of the decay of the nerve impulse at the bifurcation of the nerve fibers or the appearance of heterogeneity of the passing of a nerve impulse (the presence of dissipation in the environment) is investigated. Physical modeling allows obtaining and studying the analytical results and elucidating the physical prin-ciples of biological processes.
Abstract: In the work, transmission of nerve impulses along nerve fibers is simulated. Research is being conducted in the framework of the electrical theory of propagation of the action potential. The soliton approach is used. The numerical experiment on the evolution of the nerve impulse and the laws of motion is conducted. It is shown that the stable form ...
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From Molecular Machines to Macroscopic Fields: an Accent to Characteristic Times
Lev V. Beloussov,
Ilya V. Volodyaev
Issue:
Volume 1, Issue 1, February 2013
Pages:
6-15
Received:
15 March 2013
Accepted:
Published:
20 February 2013
Abstract: The aim of this essay is to review up to now scattered data related to the integration of activities of molecular machines into higher level events, providing macroscopic organization of living beings. According to the self-organization theory, one of the main instruments for such integration is enlarging of characteristic times, going as a rule, hand by hand with characteristic dimensions. We start from the “classical”, short-range mechanoelectrical protein machines emphasizing their capacity to slow down the rate of energy relaxation and to concentrate energy in a restricted number of freedom degrees. Then we pass to newly described “low entropy machines”, and briefly discuss characteristic times of morphogenetic processes. A special emphasis is made on temporal patterns of the so called biophoton emission (ultraweak photon emission from the living organisms) which have a remarkable property to be spread throughout the levels ranging from milliseconds to dozens of minutes.
Abstract: The aim of this essay is to review up to now scattered data related to the integration of activities of molecular machines into higher level events, providing macroscopic organization of living beings. According to the self-organization theory, one of the main instruments for such integration is enlarging of characteristic times, going as a rule, h...
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