Figure 4.

Bandpass coincidence detection duration tuning. Shown are model neuron responses to a single standard input stimulus from the cochlear nucleus at 400 Hz for a duration of 5 ms (A) and 15 ms (B) to illustrate model responses to a BD stimulus and a longer duration stimulus. Membrane potential (voltage) traces of every neuron in the model are shown with action potentials truncated for improved subthreshold clarity. Action potentials from the cochlear nucleus Poisson spiking processes are drawn as instantaneous spikes. A, The duration-tuned neuron produced action potentials when there was a coincidence of spikes from the delayed onset and offset populations. B, When excitations from the delayed onset and offset populations did not coincide, the membrane potential of the DTN remained subthreshold and no action potentials were produced. Stimulus duration is illustrated as black bars on the time axis.