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J Neurosci. 2009 Apr 8;29(14):4675-80. doi: 10.1523/JNEUROSCI.5294-08.2009.

Uniform signal redundancy of parasol and midget ganglion cells in primate retina.

Author information

1
Salk Institute for Biological Studies, 10010 NorthTorrey Pines Road, La Jolla, CA 92037, USA.

Abstract

The collective representation of visual space in high resolution visual pathways was explored by simultaneously measuring the receptive fields of hundreds of ON and OFF midget and parasol ganglion cells in isolated primate retina. As expected, the receptive fields of all four cell types formed regular mosaics uniformly tiling the visual scene. Surprisingly, comparison of all four mosaics revealed that the overlap of neighboring receptive fields was nearly identical, for both the excitatory center and inhibitory surround components of the receptive field. These observations contrast sharply with the large differences in the dendritic overlap between the parasol and midget cell populations, revealing a surprising lack of correspondence between the anatomical and functional architecture in the dominant circuits of the primate retina.

PMID:
19357292
PMCID:
PMC3202971
DOI:
10.1523/JNEUROSCI.5294-08.2009
[Indexed for MEDLINE]
Free PMC Article

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