Fig. 2

The encoding of temporal stimuli by a neural circuit modeling an ensemble of complex cells. (A) The ith neuron in the model processes the input \(u_{1}(t)\) by two parallel linear filters with impulse responses \(g^{i1}_{1}(t)\) and \(g^{i2}_{1}(t)\), respectively, followed by squaring. The outputs are summed and then fed into a spike generator. (B) An equivalent representation of the encoding circuit in which the DSPs are represented as second-order Volterra kernels