Neuronal excitability level transition induced by electrical stimulation G. Florence, J. Kurths, B.S. Machado, E.T. Fonoff, H.A. Cerdeira, M.J. Teixeira and K. Sameshima Eur. Phys. J. Special Topics, 223 13 (2014) 2913-2922 Published online: 10 December 2014 DOI: 10.1140/epjst/e2014-02304-x