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I have been using the impedance tool in neuron and would like to understand it’s origin in more depth than appears in the documentation. In particular I would like a better understanding of how the transfer impedance (as calculated by NEURON) follows from the active cable equation and under what assumptions. I have seen links in the forum to old papers by Carnevale but at first glance they do not appear to answer my questions. Does anybody have other reference suggestions?
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NEURON calculates the transfer impedances from the model's Jacobian matrix. The Python documentation of the Impedance class goes into a bit more detail about this insofar as limitations of the calculation are concerned.