Spontaneous PSCs in NG2 glia and principal neurons of the MNTB. (A; Top row) sPSCs recorded simultaneously from a neuron and an NG2 glia under control conditions. (Bottom row) Bath application of 100 μM 4-AP increased the sPSC frequency in both cells. Note the amplitude difference in neuron and NG2 glia. (B) Single spontaneous events (shown with higher time resolution) fitted to a monoexponential. (C) Histograms of the amplitudes of sPSCs of 16 neurons and 26 NG2 glia recorded under control conditions (filled columns) or 4-AP (open columns).