Mean and SD values of features of perisomatic step current firing and of BAC firing.

Leftmost four columns–features of perisomatic step current firing, for three different step amplitudes yielding low, medium and high firing rates. Rightmost two columns–features of BAC firing. Statistics reflect several cells. In constraining models for BAC firing, we used features of the dendritic Ca2+ spike and somatic Na+ APs in response to coincident somatic and dendritic current injections, as well as BAP attenuation during current injection only to the soma (See Methods for details).