K-a channel for distal dendrites from migliore et al. (1999), model no. 2796 (from klee, ficker and heinemann (1995) as well as hoffman et al. (1997), modified to account for dax a current). Implemented by m. Migliore jun 1997. One modification from ancestor: nmin set to 0.1 (line 22). Strictly a modeling study, with no noted changes to the model, so the animal model info here reflects the ancestor model.