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Fig. 5.24. Long-range lateral connections in the combined OR/DR map. The inhibitory lateral connections of four sample neurons from the marked regions in the DR map of Figure 5.22 are shown both on the OR (top) and DR (bottom) preference and selectivity maps, as in Figure 5.12. (a) The neuron from Figure 5.21 receives connections from neurons with similar OR and DR preferences, and its connections extend along the OR axis (60^o), not the DR axis (330^o). (b) Neurons in pinwheels receive connections from neurons of all DR preferences; their OR histograms vary depending on their location in the OR map. (c) Saddle neurons receive connections corresponding to the DR preferences of the saddle, and their OR histograms vary. (d) At fractures, connections originate primarily from neurons of the two fracture preferences, and extend along their common OR preference. These OR- and DRspecific lateral connections are predictions that can be tested in future biological experiments.