models for real neural spike initiators

[Bruce Raoul Parnas]

I am currently exploring various models used in computer simulations of real neurons,
particularly implementations of spike initiators.  i have been looking at the two time-
constant model proposed by Hill and others many years ago, a temperature-scaled version
of the Hodgkin-Huxley model, and the model proposed by Frankenhauser and Dodge.

Are people aware of other spike initiator models being used in computer models of
biological neurons?

thanx,
bruce
(brp at bandit.berkeley.edu)