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The Journal of Neuroscience, April 8, 2009, 29(14):4675-4680; doi:10.1523/JNEUROSCI.5294-08.2009

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Brief Communications
Uniform Signal Redundancy of Parasol and Midget Ganglion Cells in Primate Retina

Jeffrey L. Gauthier,^1 * Greg D. Field,^1 * Alexander Sher,² Jonathon Shlens,^1,3 Martin Greschner,¹ Alan M. Litke,² and E. J. Chichilnisky¹

¹Salk Institute for Biological Studies, La Jolla, California 92037, ²Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, Santa Cruz, California 95060, and ³University of California, Berkeley, Berkeley, California 94720

Correspondence should be addressed to E. J. Chichilnisky, Systems Neurobiology, The Salk Institute, 10010 North Torrey Pines Road, La Jolla, CA 92037. Email: ej{at}salk.edu

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.

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Received Nov. 3, 2008; revised Dec. 17, 2008; accepted Jan. 8, 2009.

Correspondence should be addressed to E. J. Chichilnisky, Systems Neurobiology, The Salk Institute, 10010 North Torrey Pines Road, La Jolla, CA 92037. Email: ej{at}salk.edu

This article has been cited by other articles:

				Y. S. Liu, C. F. Stevens, and T. O. Sharpee Predictable irregularities in retinal receptive fields PNAS, September 22, 2009; 106(38): 16499 - 16504. [Abstract] [Full Text] [PDF]

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