Table 1. Description of somatodendritic gradients in passive properties and channel gradients used in the model.

Parameter	Gradient of distribution
Specifc membrane resistivity, R m	$R_{\text{m}}(x)=R_{\text{m}}+\frac{\left(R_{\text{m}-}\min -R_{\text{m}-}\max \right)}{1+\exp \left(\left(R_{\text{m}-}\text{HMP}-x\right)/R_{\text{m}-}\text{slope}\right)}\text{k}\Omega /{\text{cm}}^2$
Axial resistivity, R a	$R_{\text{a}}(x)=R_{\text{a}}+\frac{\left(R_{\text{a}-}\min -R_{\text{a}-}\max \right)}{1+\exp \left(\left(R_{\text{a}-}\text{HMP}-x\right)/R_{\text{a}-}\text{slope}\right)}\Omega \text{cm}$
Maximal conductance of NaF channels	ḡ Na, uniform across the somatodendritic arbor, with the density at the axon initial segment set at 5 ḡ Na
Maximal conductance of KDR channels	ḡ KDR, uniform across the somatodendritic arbor
Maximal conductance of KA channels	${\text{g}}_{\text{KA}}\left(x\right)={\overline{g}}_{\text{KA}}\left(1+\frac{{\overline{g}}_{\text{ka}-}\text{fold}}{100}\right){\text{mS/cm}}^2$
Maximal conductance of h channels	${\text{g}}_{\text{h}}\left(x\right)={\overline{g}}_{\text{h}}\left(1+\frac{{\overline{g}}_{\text{h}-}\text{fold}}{1+\exp \left(\left({\overline{g}}_{\text{h}-}\text{HMP}-x\right)/{\overline{g}}_{\text{h}-}\text{slope}\right)}\right){\text{μS/cm}}^2$
Maximal conductance of CaT channels	${\text{g}}_{\text{CaT}}\left(x\right)={\overline{g}}_{\text{CaT}}\left(1+\frac{{\overline{g}}_{\text{CaT}-}\text{fold}}{1+\exp \left(\left({\overline{g}}_{\text{CaT}-}\text{HMP}-x\right)/{\overline{g}}_{\text{CaT}-}\text{slope}\right)}\right){\text{μS/cm}}^2$

x represents radial distance from the soma. These distributions are identical to those described in Basak and Narayanan (2018b)

HMP half-maximal point