We construct a resonance model for deep-inelastic electroproduction on nucleons in which $\ensuremath{\nu}{W}_{2}$ shows explicit Regge behavior. The extrapolation of the full expression for $\ensuremath{\nu}{W}_{2}$ to the low-${\ensuremath{\omega}}^{\ensuremath{'}}$ and fixed-${Q}^{2}$ region provides a rather accurate average to the resonances in the sense of certain finite-energy sum rules. The residues of the proton and neutron $J=0$ fixed poles are computed as functions of ${Q}^{2}$ turning out to be nonpolynomial, and as ${Q}^{2}\ensuremath{\rightarrow}0$ they approach the well-known photoproduction values. The neutron residue never becomes greater than zero, while the proton residue changes sign at ${Q}^{2}=0.08$ Ge${\mathrm{V}}^{2}$. We finally obtain an interesting expression for the limiting value of the excitation vertex radius, i.e., $〈{r}^{2}〉=(\frac{3}{4{\ensuremath{\pi}}^{2}\ensuremath{\alpha}})[\frac{{\ensuremath{\sigma}}_{T}^{\ensuremath{\gamma}N}(\ensuremath{\infty})}{{F}_{2}(\ensuremath{\infty})}]$.