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Neuroscience. 1991;40(1):217-37.

The topography of magnocellular projecting ganglion cells (M-ganglion cells) in the primate retina.

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Departmento de Fisiologia, Universidade Federal do ParĂ¡, Brazil.


The projection from the retina to the dorsal lateral geniculate nucleus in the primate arises from two morphologically distinct types of ganglion cells. The P-ganglion cells project to the parvocellular layers, the M-ganglion cells to the magnocellular layers. We have developed a neurofibrillar stain which stains the M-ganglion cell population with a high degree of selectivity allowing us to map their distribution across the retina. As with other ganglion cell types the M-ganglion cell density peaks close to the fovea and declines towards the periphery. At 1 mm from the fovea the proportion of M-ganglion cells ranges from 6 to 10% and then increases to about 8-10% over much of the retina except along the nasal horizontal meridian. Along the nasal horizontal meridian the percentage increases from 10% at 7 mm eccentricity to 20% or more at higher eccentricities. The increased percentage of M-ganglion cells in the nasal quadrant of the retina correlates with the relatively smaller dendritic trees of M-ganglion cells in this region.

[Indexed for MEDLINE]

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