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BP: Fachverband Biologische Physik

BP 26: Posters II

BP 26.52: Poster

Thursday, February 28, 2008, 17:00–19:30, Poster A

Poisson-Nernst-Planck description of nonequilibrium membrane potentials — •David Hofmann and Joachim Dzubiella — Physics Department, TU-Munich

The time-dependent Nernst-Planck and Poisson equations are solved numerically for a model cell membrane between aqueous reservoirs containing several ionic species. The steady state situation is analyzed and compared to the Goldman-Hodgkin-Katz equation, the analytical description of a cell membrane resting potential. Furthermore the full non-equilibrium situation is analyzed in order to describe the dynamic evolution of an action potential. The results are compared to the Hodgkin-Huxley model and available experimental data.