Figure 2.

Model simulations with homogenous and heterogeneous input populations. (A) Orientation tuning of a homogenous input population. Shown is a subset of the total population (n = 20/1,000). The ordinate is orientation preference, restricted between −90 ^o and 90^o. (B) Derived weights for a single decoder neuron (preferring 0^o) reading out the homogenous (blue) input population in (A). Weights for homogenous populations smoothly vary over orientation space. (C) Response output of the decoder neuron whose weights are shown in (B). (D–F) Same as in (A–C) for a heterogeneous input population with moderate correlation (c_o = 0.25). Note that decoder weights for heterogeneous input populations are not smooth.