Magnocellular Retinal Ganglion Cell Size
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Magnocellular retinal ganglion cells may have been enlarged in human evolution. Dacey has demonstrated that the magnocellular class of ganglion cells in the retina are larger in humans than in macaques, although the sizes of the parvocellular retinal ganglion cells are very similar. This may reflect an evolutionary specialization of humans for contrast and motion sensitivity, which are mediated by the magnocellular ganglion cells. However, there are no comparable data for hominids other than humans.
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Dendritic field size and morphology of midget and parasol ganglion cells of the human retina., , Proc Natl Acad Sci U S A, 1992 Oct 15, Volume 89, Issue 20, p.9666-70, (1992)