Spike rate at offset reflects DCI, independent of period. A, Effect of DCI on peak spike rate at offset. Period was held constant at 0.93 s, except for “DC hyp” data, which was DC hyperpolarization for the same duration as the rhythmic inhibition was applied (18.6 s). DC hyperpolarization was done on a subset (n = 5) of experiments (see Materials and Methods). B, Effect of period on peak spike rate at offset. DCI was held constant at 40%. Differences were not statistically significant (N.S.). C, Correlation between peak spike rate at offset and spike rate during the final burst (see Fig. 1D). Dashed line is a linear fit. Gray line is the identity line. Data were pooled for periods of 0.93 s (DCI of 20% and 40%) and 1.35 s (DCI of 40%). Error bars in all panels give SEM.