Fig. 1.

Interspike interval histograms. Each of the two rows shows an interspike interval histogram for a single neuron. Each histogram plots the total number (0.1 msec bin width) of interspike intervals (ordinate) exhibited by the neuron during the entire recording session that were of durations, ≥0.1 msec and ≤25.0 msec (abscissa). To the left of each histogram is a sample of the corresponding neural waveform. The sample consists of the first 500 consecutively recorded waveforms of the recording session. Positive voltage is up. The vertical calibration bar to the left of each waveform sample indicates 0.05 mV; each waveform trace spans 0.64 msec. In all figures,letters at top left of histograms correspond to identifying labels in other figures representing the same neurons.