Figure 1.

Schematic representation of the excitatory and inhibitory synaptic inputs projecting onto the multicompartmental V4 neuron model.

Two excitatory synaptic input pools were provided to represent the two competing stimuli projecting from V2. The ‘Preferred’ excitatory input (E_p) had a greater number of glutamatergic synapses (400 in most simulations) than the ‘Non-Preferred’ (E_np, 100 synapses). A single feedforward inhibitory interneuron pool (I_ff) was used with 80 GABAergic synapses. The firing rate of the inhibitory synaptic inputs was a linear function of the firing rate of the active V2 excitatory pool(s) (see Methods). The V4 neuron also received continuous uncorrelated background excitatory and inhibitory synaptic inputs, containing 5000 and 920 synapses respectively. Arrows represent excitatory projections, filled circles represent inhibitory projections.