The structure of large-scale synchronized firing in primate retina.

Published

Journal Article

Synchronized firing among neurons has been proposed to constitute an elementary aspect of the neural code in sensory and motor systems. However, it remains unclear how synchronized firing affects the large-scale patterns of activity and redundancy of visual signals in a complete population of neurons. We recorded simultaneously from hundreds of retinal ganglion cells in primate retina, and examined synchronized firing in completely sampled populations of approximately 50-100 ON-parasol cells, which form a major projection to the magnocellular layers of the lateral geniculate nucleus. Synchronized firing in pairs of cells was a subset of a much larger pattern of activity that exhibited local, isotropic spatial properties. However, a simple model based solely on interactions between adjacent cells reproduced 99% of the spatial structure and scale of synchronized firing. No more than 20% of the variability in firing of an individual cell was predictable from the activity of its neighbors. These results held both for spontaneous firing and in the presence of independent visual modulation of the firing of each cell. In sum, large-scale synchronized firing in the entire population of ON-parasol cells appears to reflect simple neighbor interactions, rather than a unique visual signal or a highly redundant coding scheme.

Full Text

Duke Authors

Cited Authors

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

Published Date

  • April 15, 2009

Published In

Volume / Issue

  • 29 / 15

Start / End Page

  • 5022 - 5031

PubMed ID

  • 19369571

Pubmed Central ID

  • 19369571

Electronic International Standard Serial Number (EISSN)

  • 1529-2401

Digital Object Identifier (DOI)

  • 10.1523/JNEUROSCI.5187-08.2009

Language

  • eng

Conference Location

  • United States