Identical to hodgkin-huxley squid axon dynamics, with sodium, potassium and leak channels. The rate function parameters have been changed to correspond to dodge & cooley (1973) paper. Ancestor is listed as the original hh.mod channel, as is available through neuron. Animal model is as specified in the paper. No experiments in paper, channel kinetics were adapted from the original hh formulation based on various previous experimental results.