Abstract
ABSTRACTAction potentials in neurons are known to annihilate each other upon collision, while there are cases where they might penetrate each other. Compression waves that travel within the plasma membrane of a neuron have previously been proposed as a thermodynamic basis for the propagation of action potentials. In this context, it was recently shown that two-dimensional compressive shock waves in the model system of lipid monolayers can nearly annihilate each other upon head-on collision when excited close to a phase transition. However, weaker shock waves showed penetration. In general, once the approximation of small perturbation is not valid, compression waves do not interact linearly anymore. While experiments in lipid monolayers demonstrated this principle, a mechanism remained unclear. In this article, we summarise the fundamentals of shock physics as applied to an interface and how it previously explained the observation of threshold and saturation of shockwaves in the lipid monolayer (all – or – none). While the theory has the same fundamental premise as the soliton model, i.e. the conservation laws and thermodynamics, we elaborate on how the two approaches make different predictions with regards to collisions and the detailed structure of the wave-front. As a case study and a new result, we show that previously unexplained annihilation of shock waves in the lipid monolayer is a direct consequence of the nature of state changes, i.e. jump conditions, within these shockwaves, and elaborate on the consequence of these results for the general understanding of the excitation waves in a thermo-fluids framework.
Publisher
Cold Spring Harbor Laboratory
Reference70 articles.
1. A quantitative description of membrane current and its application to conduction and excitation in nerve;J Physiol,1952
2. Mechanical surface waves accompany action potential propagation;Nat Commun,2015
3. Towards a thermodynamic theory of nerve pulse propagation;Prog Neurobiol,2009
4. Kaufmann K , Hanke W , Corcia A (1989) Ion channel fluctuations in pure lipid bilayer membranes: control by voltage (Caruaru, Caruaru, Brasil) Available at: http://www.membranes.nbi.dk/Kaufmann/pdf/1989_Kaufmann_book3_ed.pdf.
5. Kaufmann K (1989) Action Potentials and Electrochemical Coupling in the Macroscopic Chiral Phospholipid Membrane. Caruara, Brazil (https://sites.google.com/site/schneiderslab/research-group/literature).
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献