Input/output relations when the neuron receives an additional input in the context of the depression modulation.

<p>Panels display input/output activity maps equivalent to the maps shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0145830#pone.0145830.g003" target="_blank">Fig 3</a> (#<i>spikes</i> denotes the number of spikes per burst and <i>f</i>_<i>d</i> the intraburst stimulation frequency through the dynamic channel), but when the neuron receives a second tonic incoming input with frequency <i>f</i>_<i>s</i> through the static channel.