Representative recordings from GP neurons of three visually separated subgroups.

<p><i>Ai</i>, <i>Bi</i>, and <i>Ci</i>, responses of GP cells to depolarizing current steps (50 pA increment, 600 ms) applied from 0 to 550 pA using whole-cell configuration of the patch-clamp technique. Representative membrane potentials recorded in response to 100 pA are given for each cell type. Sampled at 20 kHz and filtered at 10 kHz. <i>Aii</i>, <i>Bii</i>, and <i>Cii</i>, responses of GP cells to hyperpolarizing current steps applied from 0 to −450 pA (50 pA increment, 600 ms) using the whole-cell configuration of the patch-clamp technique.