Fig. 4. Physiology of representative DCN cells.

A. A type I cell, showing a high level of spontaneous firing, a large “sag” and robust rebound firing in response to hyperpolarizing current steps. B. A single hyperpolarizing current step (350 pA) induces robust rebound responses in a type I cell under resting conditions. C. A type II cell also shows a large “sag” but only moderate rebound firing in response to similar current steps. D. A single hyperpolarizing current step (350 pA) induces moderate rebound responses in a type II cell under resting conditions. Note that responses of both types of cells to hyperpolarizing inward current injections are similar to those reported by Czubayko et al, 2001.