Figure 6.

Overview and detail of juxtacellularly labeled interneurons of the rabbit flocculus with the respective ISI histograms of their spontaneous activity. A, A Golgi cell located in the molecular layer (Spacek et al., 1973). Note the irregular firing as shown in the ISI histogram and the absence of the short interval ISIs characteristic of basket and stellate cells. B, A UB cell with an extremely regular firing pattern. The second peak at twice the average ISI duration reflects the occasional absence of spikes from the overall pattern (compare Fig. 5E, second panel). C, A basket cell with a high firing rate and consequently many short ISIs (<25 ms), but also with several longer intervals (>200 ms). The arrows (middle panel) point to pinceau formations of the axon. D, A stellate cell with high-frequency firing and thus with many short intervals (<25 ms). Overall, the morphological and firing characteristics of these interneuron classes are similar to those observed in the rat. Scale bars: (in overviews) 1000 μm; (in the details) 25 μm.