Receptive fields in primate retina are coordinated to sample visual space more uniformly.

Published

Journal Article

In the visual system, large ensembles of neurons collectively sample visual space with receptive fields (RFs). A puzzling problem is how neural ensembles provide a uniform, high-resolution visual representation in spite of irregularities in the RFs of individual cells. This problem was approached by simultaneously mapping the RFs of hundreds of primate retinal ganglion cells. As observed in previous studies, RFs exhibited irregular shapes that deviated from standard Gaussian models. Surprisingly, these irregularities were coordinated at a fine spatial scale: RFs interlocked with their neighbors, filling in gaps and avoiding large variations in overlap. RF shapes were coordinated with high spatial precision: the observed uniformity was degraded by angular perturbations as small as 15 degrees, and the observed populations sampled visual space with more than 50% of the theoretical ideal uniformity. These results show that the primate retina encodes light with an exquisitely coordinated array of RF shapes, illustrating a higher degree of functional precision in the neural circuitry than previously appreciated.

Full Text

Duke Authors

Cited Authors

  • Gauthier, JL; Field, GD; Sher, A; Greschner, M; Shlens, J; Litke, AM; Chichilnisky, EJ

Published Date

  • April 7, 2009

Published In

Volume / Issue

  • 7 / 4

Start / End Page

  • e1000063 -

PubMed ID

  • 19355787

Pubmed Central ID

  • 19355787

Electronic International Standard Serial Number (EISSN)

  • 1545-7885

Digital Object Identifier (DOI)

  • 10.1371/journal.pbio.1000063

Language

  • eng

Conference Location

  • United States