Comparison Of Different Models Of Orientation Selectivity In
Primary Visual Cortex
Author(s)
G.E.La Cara & M. Ursino
Abstract
Comparison of different models of orientation
selectivity in primary visual cortex
G.E. La Cara & M. Ursino
Department of Electronics, Computer Science, and Systems
University of Bologna, Italy.
Abstract
Aim of this work is to compare different models for orientation selectivity in simple
cells of the primary visual cortex, in order to gain deeper insight into the
role and disposition of cortical connections. Two different models of simple cell
response in an hypercolumn are compared. Both receive the same input pattern
from the lateral geniculate nucleus, assuming that the geometry of the receptive
field can be described through a Gabor function. Moreover, in both models cortical
cells receive excitatory synapses from other neurons in the hypercolumn with near
orientation preference. The two models differ as to the arrangement of inhibitory
connections: in the first, inhibition is in phase opposition with excitation, but with a
similar orientation tuning; in the second, inhibition is in phase
Keywords
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