Fig. A4.

Firing patterns with and without I_h. A: response patterns of a modeled transient-firing VGN when driven by a series of hyperpolarizing and depolarizing current steps. Solid lines show responses without (w/o) I_h, and dashed lines show responses with (w/) I_h. B: same as A, but for a modeled sustained-firing VGN. Although hyperpolarizing steps reveal the voltage sag characteristic of I_h, the current does not significantly influence resting potentials, AHPs, or depolarization-induced firing patterns.