The Neural Control of Vision
E. The Striate Cortex

Figure 10 shows the major connections from the LGN to area V1. The LGN receives input from 3 major classes of retinal ganglion cells. The midget cells that project to the parvocellular layers (3-6), the parasol cells that project to the magnocellular layers (1-2) and the koniocellular cells that project to the intralaminar layers of the LGN. The parvocellular LGN cells project predominantly to layer 4c beta and the magnocellular LGN cells to layer 4c alpha. The koniocellular cells project predominantly to the upper layers of V1, layers 1 and 2. A subpopulation of these cells appears to be involved in processing color coding the blue/yellow system (see Color Processing).