Figure 6.

Breakdown of the interaction network by edge removal. A, The number of disjoint connected components in the network is plotted against the number of edges in the network. Retina responding to a natural movie (Nat Mov; as in Fig. 1A) is depicted by a solid line, and the response to a natural pixel (Nat Pix) movie is depicted by a dashed line. Edges were sequentially added to the functional interaction network by order of decreasing interaction magnitude (|β|, red), decreasing correlation magnitude (blue), increasing receptive field (RF) center distance (green, dashed and solid lines overlay because receptive fields are identical for both conditions), or random order (gray area represents mean ± 1 SD). B, The maximal connected component size is plotted against the number of edges in the network. Details are as in A. Clearly, if we only keep edges among highly correlated (or anticorrelated) pairs, the resulting network is composed of significantly more and smaller disjoint components. C, Illustration of the functional interaction network under natural movie stimulation with 100 (left), 500 (middle), and 1000 (right) edges, respectively. Edges retained in each network were the ones corresponding to greatest correlation magnitudes.