# Propagation of a Thermo-mechanical Perturbation on a Lipid Membrane

## TL;DR

This study investigates how thermo-mechanical disturbances propagate on artificial lipid membranes during melting, providing insights into potential mechanisms of nerve signal transmission involving solitary waves.

## Contribution

It introduces an experimental setup to observe long-distance propagation of thermo-mechanical perturbations on lipid membranes during melting.

## Key findings

- Thermo-mechanical perturbations propagate over long distances during membrane melting.
- Results support the possibility of solitary wave-like signals in lipid membranes.
- Findings may relate to nerve signal propagation mechanisms.

## Abstract

The propagation of sound waves on lipid monolayers supported on water has been studied during the melting transition. Since changes in volume, area, and compressibility in lipid membranes have biological relevance, the observed sound propagation is of paramount importance. However, it is unknown what would occur on a lipid bilayer, which is a more approximate model of a cell membrane. With the aim to answer this relevant question, we built an experimental setup to assemble long artificial lipid membranes. We found that if these membranes are heated in order to force local melting, a thermo-mechanical perturbation propagates a long distance. Our findings may support the existence of solitary waves, postulated to explain the propagation of isentropic signals together with the action potential in neurons.