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

Fig. 5.3. Combined OR/OD map in the macaque. The orientation and ocular dominance maps shown separately in Figure 2.5 are overlaid in this plot. Color encodes OR preference (according to the key on top; example map features are outlined in white as in Figure 2.4), and the black outlines represent OD stripe boundaries, obtained as areas of high OD gradient. The features in the two maps are systematically organized. The OD boundaries intersect the OR boundaries of linear zones (long rectangle) at right angles, and rarely follow an OR boundary. Pinwheel centers (circles) are usually found well inside the OD stripes, and rarely near their boundaries. Note that, unlike the small patches seen in the cat OD maps (Figure 5.2), the OD patches in the monkey typically consist of long stripes (as also shown in Figure 2.5b). Reprinted with permission from Blasdel (1992b), copyright 1992 by the Society for Neuroscience; annotations added, OD contours replotted from data by Blasdel (1992a).