Abstract
THE primate cortical visual system is composed of many structurally and functionally distinct areas1–3, each receiving and sending about 10 projections from and to other cortical areas1. The visual cortex is thus served by many cortico–cortical connections to form a network of considerable complexity. Thus the gross organization of this cortical processing system presents a formidable topological problem: although the spatial position of the areas in the brain is reasonably well established, the gross 'processing architecture' defined by the connections, is less well understood. Here I report an optimization approach that gives both qualitative and quantitative insight into the connectional topology of the primate cortical visual system. This approach supports suggestions that the system is divided into a dorsal 'stream' and a ventral 'stream' with limited cross-talk, that these two streams reconverge in the region of the principal sulcus (area 46) and in the superior temporal polysensory areas, that the system is hierarchically organized, and that the majority of the connections are from 'nearest-neighbour' and 'next-door-but-one' areas.
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Young, M. Objective analysis of the topological organization of the primate cortical visual system. Nature 358, 152–155 (1992). https://doi.org/10.1038/358152a0
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DOI: https://doi.org/10.1038/358152a0
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