Table 4.

Equations and parameters for myelinated axon models

Variable	Equation
Membrane potential V (of j-th node)	$c_m^j\hspace{0.17em}\mathrm{d}{V}_j(t)/\mathrm{d}\mathrm{t}=I_{\text{L}}^j+I_{\text{active}}^j+I_{\text{axon}}^j+I_{\text{inj}}^j$
Leak current	$I_{\text{L}}^j={\text{g}}_{\text{L}}^j(E_{\text{L}}-V_j)$
Active current (for WB model)	$I_{\text{active}}^j=I_{\text{Na}}^j+I_{\text{K}}^j$
Active current (for bEIF model)	$I_{\text{active}}^j=I_{\text{dep}}^j+I_{\text{rep}}^j$
Axonal current	$I_{\text{axon}}^j={\text{g}}_{\text{axon}}^{j-1}(V_{j-1}-V_j)+{\text{g}}_{\text{axon}}^j(V_{j+1}-V_j)$
Intracellularly injected current	$I_{\text{inj}}^j=0$ (default)
Membrane capacitance	$c_m^j=\pi D{L}_n{C}_m$
Leak conductance	${\text{g}}_{\text{L}}^j=\pi D{L}_n{\text{G}}_{\text{L}}$
Axonal resistance	$r_{\text{axon}}^j=\frac{4L_i{R}_{\text{ax}}}{\pi D^2}$
Axonal conductance	${\text{g}}_{\text{axon}}^j=1/R_{\text{axon}}^j=\frac{\pi D^2}{4L_i{R}_{\text{ax}}}$
Parameter	Value
Axon diameter D	2 μm
Nodal length Ln	2 μm
Internodal length Li	200 μm
Axial resistivity Rax	100 Ω cm

Parameters not listed in this table are unchanged from the single-compartment models (Tables 1, 3).