Kv4 csi (closed-state inactivation) markov model from fineberg, ritter and covarrubias (2012), based on amarillo et al. (2008) and fitted to theoretical currents generated from model in migliore et al. (1999). Used to replace the distal a-type channels. No modeldb ancestors. Animal model is from ancestor (migliore et al. 1999). Experiments in this paper were done on granule neurons (cgn) and dorsal root ganglion neurons (drg), but these were not modeled explicitly.