Figure 4.

RC distribution for the simulated foveal population (dominant eye). RC is a symmetry-invariant size descriptor for simple-cell receptive fields (for a detailed description, see Materials and Methods). High values along the n_x-axis convey large number of lobes in the receptive field, while high values along the n_y-axis describe elongated receptive fields. Receptive fields for some representative neurons are also shown. The pink neurons are examples of blob-like receptive fields, while cyan markers illustrate two to three lobed neurons, which constitute the majority of the converged population. Brown markers show neurons with a higher number of lobes, while the purple marker shows a neuron with an elongated receptive field. Most of the converged neurons lie within the square bounded by 0 and 0.5 along both axes (shaded in blue), something that is also observed in electrophysiological recordings in monkey and cat (Ringach, 2002).