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. 2008 Feb 22;25(1):89–107. doi: 10.1007/s10827-007-0066-2

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© The Author(s) 2008

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Fig. 1 — Schematic overview of the simple feedforward model. A preferred and a non-preferred stimulus are represented by spike trains, coming from two populations (X1 and X2) of 80 Poisson model neurons, each. These two populations project to a population of 40 Hodgkin–Huxley type interneurons (I) and to the Hodgkin–Huxley type output neuron Y. Each population receives its own time-dependent rate defined in Eq. (1). Therefore, the spike trains within a population are correlated with each other, but not with spike trains in the other population. The two population activities are statistically the same as long as they are both unattended or both attended. The difference between responses to preferred and non-preferred stimulus is determined by the different synaptic conductances. Population X2 (non-preferred stimulus) has stronger projections to the interneurons I and weaker to the output neuron Y than population X1 (preferred stimulus) ( and ). Spikes, generated by the interneurons arrive after a short delay τ _d of 2 ms at neuron Y. In addition both HH-like neurons (I and Y) receive background noise, represented by conductance injections in the soma

Inline graphic — Schematic overview of the simple feedforward model. A preferred and a non-preferred stimulus are represented by spike trains, coming from two populations (X1 and X2) of 80 Poisson model neurons, each. These two populations project to a population of 40 Hodgkin–Huxley type interneurons (I) and to the Hodgkin–Huxley type output neuron Y. Each population receives its own time-dependent rate defined in Eq. (1). Therefore, the spike trains within a population are correlated with each other, but not with spike trains in the other population. The two population activities are statistically the same as long as they are both unattended or both attended. The difference between responses to preferred and non-preferred stimulus is determined by the different synaptic conductances. Population X2 (non-preferred stimulus) has stronger projections to the interneurons I and weaker to the output neuron Y than population X1 (preferred stimulus) ( and ). Spikes, generated by the interneurons arrive after a short delay τ _d of 2 ms at neuron Y. In addition both HH-like neurons (I and Y) receive background noise, represented by conductance injections in the soma

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