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Fig. 5.8. Self-organized afferent and lateral weights across V1. This plot shows the range of afferent and lateral weights developed by the neurons in the orientation map, by plotting them for every 12th neuron horizontally and vertically, using the conventions introduced in Figure 5.7. (a) A number of two- and three-lobed receptive fields exist with strong orientation preferences. Some neurons, however, have ring-shaped RFs and respond to all directions equally. (b) These neurons receive lateral inhibitory connections from all nearby neurons, but from distant neurons only if they have similar OR preferences and are located along the preferred orientation. The lateral excitatory connections of each neuron (not shown) come from all nearby neighbors, and thus are all nearly circular.