RT Journal Article T1 Pulse propagation in discrete systems of coupled excitable cells A1 Carpio, Ana A1 Bonilla, L.L. AB Propagation of pulses in myelinated fibers may be described by appropriate solutions of spatially discrete FitzHugh-Nagumo systems. In these systems, propagation failure may occur if either the coupling between nodes is not strong enough or the recovery is too fast. We give an asymptotic construction of pulses for spatially discrete FitzHugh-Nagumo systems, which agrees well with numerical simulations, and discuss the evolution of initial data into pulses and pulse generation at a boundary. Formulas for the speed and length of pulses are also obtained. PB Society for Industrial and Applied Mathematics SN 0036-1399 YR 2002 FD 2002 LK https://hdl.handle.net/20.500.14352/57208 UL https://hdl.handle.net/20.500.14352/57208 LA eng NO [1] A. Amann, A. Wacker, L. L. Bonilla, and E. Sch¨oll, Dynamic scenarios of multistable switching in semiconductor superlattices, Phys. 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