The pattern of ocular dominance columns in macaque visual cortex revealed by a reduced silver stain

A pattern of alternative dark and pale bands was observed in the straite cortex of the macaque monkey. The bands, which ran parallel to the surface, were seen in tangential sections stained with a reduced silver method for normal fibers and were most clear in layer 4C α, immediately deep to the line of Gennari. The dark bands were about 300 μ wide and showed blind endings and bifurcations. The light bands were about 50 μ wide and did not branch or terminate within area 17.