Fig. 8 Connections between the left lateral geniculate nucleus (LGN) and striate cortex (V1) of macaque monkey. LGN layers 1 and 2 are magnocellular laminae and layers 3 through 6 are parvocellular laminae. Spectrally opponent cells in the parvo layers project to striate layers 4cβ or 4a. Magno layers project to 4cα. (Adapted from Lennie P: Recent developments in the physiology of color vision. Trends in Neurosciences 7:243, 1984). Each of the 6 layers has a koniocellular sublayer that carries S cone signals to target layers I and III in primary visual cortex.