Membrane potential traces.

<p>(A) <i>In vivo</i> intracellular recording from a barn owl's NL neuron (data taken from [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0122796#pone.0122796.ref013" target="_blank">13</a>]). Tonal stimulus at the best frequency (3600 Hz) was presented to the both ears by changing ITDs. (B) Simulated membrane potential of the two-compartment active IF model. (C) Simulated membrane potential of the single-compartment active IF model. (D) Simulated membrane potential of the single-compartment passive IF model. (B-D) Simulated binaural inputs are injected to the model neurons (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0122796#sec002" target="_blank">Materials and Methods</a> for detail). "In-phase" means that the oscillation peaks of both inputs coincide resulted in the largest oscillation amplitudes. "Out-of-phase" means that the oscillating bilateral synaptic inputs are cancelled with each other to minimize the signal component at <i>f</i>_stim = 4000 Hz [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0122796#pone.0122796.ref029" target="_blank">29</a>].