Figure 3.

Synaptically mediated responses contain discrete spiking clusters. A. Spiking response to a pulse train of 2Hz. The response to three stimulation repetitions (30 pulses in all) are overlaid, revealing separate clusters of spikes. Latency was measured relative to stimulus onset. B. An expanded view of the early phase response (box in panel A). C-D. The number of spikes recorded from a representative cell is plotted as a function of pulse number for all rates. The spiking response was split into early phase spikes (<15ms latency) and late phase spikes (>15ms latency). Error bars indicate standard deviation.