Table 2.

Ionic currents of hippocampal (CA1) and RN.

ID	Channel	Current density	CA1	RN
NaT	Transient Na+	$J_{\mathrm{NaT}}=g_{\mathrm{NaT}}{m}^{3}h\left(E_{\mathrm{Na}}-V\right)$	Yes	Yes
NaP	Persistent Na+	$J_{\mathrm{NaP}}=g_{\mathrm{NaP}}m\left(E_{\mathrm{Na}}-V\right)$	Yes	Yes
K	Non-inactivating K+	$J_{\mathrm{K}}=g_{\mathrm{K}}{m}^4\left(E_{\mathrm{K}}-V\right)$	Yes	Yes
A	Rapidly inactivating K+	$J_{{\mathrm{K}}_{\mathrm{A}}}=g_{{\mathrm{K}}_{\mathrm{A}}}{m}^{4}h\left(E_{\mathrm{K}}-V\right)$	Yes	Yes
AHP	Calcium-activated K+	$J_{K_{\mathrm{AHP}}}=g_{{\mathrm{K}}_{\mathrm{AHP}}}m\left(E_{\mathrm{K}}-V\right)$	d.d.	Rare
CaL	High threshold Ca2+	$J_{\mathrm{CaL}}=\rho m^2{J}_{\mathrm{Ca}}$	d.d.	Rare
CaT	Low threshold Ca2+	$J_{\mathrm{CaT}}=m^{2}h{J}_{\mathrm{Ca}}$	d.d.	Rare
HCN	Hyperpolarisation-activated cation	$J_{\mathrm{HCN}}=g_{\mathrm{HCN}}h\left(E_{\mathrm{HCN}}-V\right)$	d.d.	d.d.
M	Muscarinic-sensitive K+	$J_{\mathrm{M}}=g_{\mathrm{M}}m\left(E_{\mathrm{K}}-V\right)$	Yes	No
Leak	Leak channels	$J_{\mathrm{L}}=g_{\mathrm{L}}\left(E_{\mathrm{L}}-V\right)$	Yes	Yes

RN respiratory neuron, d.d. distal dendrite

Ion current densities $J_{\alpha }$ of conductance models as a function of ionic conductances $g_{\alpha }$, reversal potentials $E_{\mathrm{Na}}\approx +45$ mV, $E_{\mathrm{K}}\approx -90$ mV, $E_{\mathrm{HCN}}=-43$ mV⁷⁰ and maximum calcium current $J_{\mathrm{Ca}}$ The ionic currents of the solid-state model $I_{\alpha }=\left(I_m-I_h\right)\theta \left(I_m-I_h\right)$ are given by Eq. (10). Prevalence of ion channels in CA1 neurons⁴⁸ and respiratory neurons^55,56 distinguishing soma and distal dendrites (d.d.)