Fig. 5.

Cells in the GCL exhibit two distinct single AP waveforms in response to short depolarizing pulses, while hilar DGCs all exhibit similar waveforms. A: example traces of APs elicited by direct, somatic current injection. Cells in the GCL display AP traces: with an afterdepolarization (ADP; A₁), or without an ADP (A₂). A₃: hilar cells only exhibit APs without an ADP. B: distribution of cells that fired each type of AP classified by location. The majority of cells in the GCL fired APs with an ADP (25/36), while none of the 7 hilar cells exhibited an ADP. C: a subset of cells in both the GCL and hilus could be driven synaptically to fire single APs. Of these cells, some fired an AP with ADP (C₁), and others fired an AP without ADP (C₂). Scale bars: 25 ms and 20 mV.