Similarities between action potentials and acoustic pulses in a van der Waals fluid

Scientific Reports
Matan Mussel, Matthias F Schneider

Abstract

An action potential is typically described as a purely electrical change that propagates along the membrane of excitable cells. However, recent experiments have demonstrated that non-linear acoustic pulses that propagate along lipid interfaces and traverse the melting transition, share many similar properties with action potentials. Despite the striking experimental similarities, a comprehensive theoretical study of acoustic pulses in lipid systems is still lacking. Here we demonstrate that an idealized description of an interface near phase transition captures many properties of acoustic pulses in lipid monolayers, as well as action potentials in living cells. The possibility that action potentials may better be described as acoustic pulses in soft interfaces near phase transition is illustrated by the following similar properties: correspondence of time and velocity scales, qualitative pulse shape, sigmoidal response to stimulation amplitude (an 'all-or-none' behavior), appearance in multiple observables (particularly, an adiabatic change of temperature), excitation by many types of stimulations, as well as annihilation upon collision. An implication of this work is that crucial functional information of the cell may be overl...Continue Reading

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Citations

Apr 9, 2019·Journal of the Royal Society, Interface·Matan Mussel, Matthias F Schneider
Nov 24, 2020·Progress in Biophysics and Molecular Biology·Simon FabiunkeMatthias F Schneider
Aug 30, 2020·Progress in Biophysics and Molecular Biology·Matan Mussel, Matthias F Schneider
Oct 16, 2020·Progress in Biophysics and Molecular Biology·Christian FillaferMatthias F Schneider

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