The NEURON and XPP code is available for the paper:
Coggan JS, Ocker GK, Sejnowski TJ, Prescott SA (2011) Explaining pathological changes in axonal excitability through dynamical analysis of conductance-based models. J Neural Eng 8:065002 from the authors and at the authors web site: http://prescottlab.ca/code-for-models as well as in this modeldb archive. The XPP code is the ode file in the top-level folder and the NEURON code is in the NEURONcode folder. The XPP file was contributed by Steve Prescott and the NEURON code was contributed by Jay Coggan.