K-a channel from klee, ficker and heinemann, modified to account for dax a current, and to be used with cvode by m migliore. Modified for ri18 by b kampa, 2005. From schaefer et al. (2003), model no. 22203, with various modifications. Animal model is from experiments in this study. Kinetics based off of previous studies on cortical and hippocampal pyramidal neurons.