1Key Laboratory for Neuroinformation of Ministry of Education, University of Electronic Science and Technology of China, Chengdu 610054, China 
2Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China 
3The Department of Automatic Control, College of Mechatronics and Automation, National University of Defense Technology, Changsha 410073, China 
Corresponding author: Xue-Mei Song. E-mail: xmsong@sibs.ac.cn

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; orientation selectivity; tuning width; circular variance; primary visual cortex

[SpringerLink]