Influence of sodium inward current on the dynamical behaviour of modified Morris-Lecar model H. O. Fatoyinbo, S. S. Muni and A. Abidemi Eur. Phys. J. B, 95 1 (2022) 4 Published online: 06 January 2022 DOI: 10.1140/epjb/s10051-021-00269-7