Orientation selectivity in cat primary visual cortex: local and global measurement

Neurosci Bull. 2015 Oct;31(5):561-71. doi: 10.1007/s12264-014-1535-7. Epub 2015 Jun 18.

Abstract

In this study, we investigated orientation selectivity in cat primary visual cortex (V1) and its relationship with various parameters. We found a strong correlation between circular variance (CV) and orthogonal-topreferred response ratio (O/P ratio), and a moderate correlation between tuning width and O/P ratio. Moreover, the suppression far from the peak that accounted for the lower CV in cat V1 cells also contributed to the narrowing of the tuning width of cells. We also studied the dependence of orientation selectivity on the modulation ratio for each cell, which is consistent with robust entrainment of the neuronal response to the phase of the drifting grating stimulus. In conclusion, the CV (global measure) and tuning width (local measure) are signifi cantly correlated with the modulation ratio.

Keywords: cat; circular variance; orientation selectivity; primary visual cortex; tuning width.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Action Potentials
  • Animals
  • Cats
  • Female
  • Male
  • Neural Inhibition
  • Neurons / physiology*
  • Photic Stimulation
  • Visual Cortex / physiology*
  • Visual Perception / physiology*