Physiological Properties of Supragranular Cortical Inhibitory Interneurons Expressing Retrograde Persistent Firing

Figure 2

Time course of persistent firing. (a) Persistent spikes consisted of either full size action potentials only (top) or a combination of partial spikes (spikelets) and full size spikes (bottom). The traces on the right represent a magnification of the dashed-rectangle areas to allow a better visualization of both full-amplitude and partial spikes. (b), (c) Frequency of persistent spikes (with or without spikelets, resp.) as a function of time after the termination of the current step. (d) The representative traces show the whole duration of a PF episode from two different neurons. Note the sudden termination of PF at relatively high firing frequency.

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