Click on the image to see a PDF version (for zooming in)

Fig. 13.13. Afferent contribution in contour completion. The afferent contribution of the input in (a) to the GMAP activation is plotted in gray scale from white to black (low to high) in (b); the circles delineate the MUA areas as shown in Figure 13.12. The four areas corresponding to the four contour elements all receive strong afferent input. The center area, corresponding to the gap, receives weak afferent input, due to slight overlap with neighboring regions in the retina. However, as seen in Figures 13.14 and 13.15, it is not enough to activate its representation without a contribution from the lateral connections.