Gain analysis for burst and isolated spikes. A, Separate digitized firing rates, r_burst(t) and r_isolated(t), were constructed for burst and isolated spikes. G_burst(f) and G_isolated(f) were calculated based on the correlation between each component response and the stimulus current and were normalized by the mean rate of each subset of spikes. All data shown were obtained with stimuli adjusted to give r₀ ≈ 10 Hz, in cells that fired >15% of their spikes in bursts. B, Average G_burst(f) and G_isolated(f) in response to 1 ms exponential-filtered noise (n = 6 cells). C, Five millisecond exponential-filtered noise (n = 10). D, 1/f noise (n = 6). Unlike the other stimuli, 1/f noise allowed reliable measurements of G(f) at frequencies down to 0.1 Hz. E, Average G(f) for burst-starting and burst-ending spikes, in response to 5 ms exponential-filtered noise. F, Strength of primary resonance for isolated and burst spikes, for each type of noise. G, Strength of high-frequency resonance, showing a significantly greater value for burst spikes compared with isolated spikes for each stimulus. *p < 0.05.