Correlation between spatial frequency and orientation selectivity in V1 cortex: Implications of a network model

Wei Zhu, Dajun Xing, Michael Shelley, Robert Shapley

Research output: Contribution to journalArticle

Abstract

We addressed how spatial frequency and orientation selectivity coexist and co-vary in Macaque primary visual cortex (V1) by simulating cortical layer 4Cα of V1 with a large-scale network model and then comparing the model's behavior with a population of cells we recorded in layer 4Cα. We compared the distributions of orientation and spatial frequency selectivity, as well as the correlation between the two, in the model with what we observed in the 4Cα population. We found that (1) in the model, both spatial frequency and orientation selectivity of neuronal firing are greater and more diverse than the LGN inputs to model neurons; (2) orientation and spatial frequency selectivity co-vary in the model in a way very similar to what we observed in layer 4Cα neurons; (3) in the model, orientation and spatial frequency selectivity co-vary because of intra-cortical inhibition. The results suggest that cortical inhibition provides a common mechanism for selectivity in multiple dimensions.

Original languageEnglish (US)
Pages (from-to)2261-2273
Number of pages13
JournalVision research
Volume50
Issue number22
DOIs
StatePublished - Oct 28 2010

Keywords

  • Cortical excitation
  • Cortical inhibition
  • Large-scale neuronal network
  • Orientation selectivity
  • Simple cells
  • Spatial frequency selectivity

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems

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