Bursting amplifies firing resonance in a minimal model. Simulations were performed with 5 ms exponential-filtered noise (σ_I = 0.25 nA). A, G(f) for the nonbursting (ADP⁻) model. Here and in subsequent panels, levels of I_DC were chosen to give r₀ = 5, 10, 15, and 20 Hz (blue, green, orange, and red, respectively). B, G(f) for the bursting (ADP⁺) model, showing higher gain at the primary peak and a small high-frequency resonance at ∼250 Hz. C, At each r₀, the primary resonant frequency (f_peak) was slightly lower in the bursting model. D, The strength of the primary resonance (S_res) was higher in the bursting model for r₀ = 10, 15, and 20 Hz. E, G(f) for basic LIF model (AHP⁻ ADP⁻), showing low-pass behavior. F, In the absence of an AHP current, adding the ADP current increased gain at low f and created a small high-frequency resonance. G, Effect of reducing the AHP current by half. Control responses (dashed lines) are from the bursting model illustrated in B. H, Reducing the AHP increased the fraction of spikes in bursts. I, Reducing the AHP lowered the primary resonant frequency at each r₀. J, Reducing the AHP decreased the strength of the primary resonance at each r₀.