A Simple Model for Cortical Orientation Selectivity
A simple mathematical model for the large-scale circuitry of primary visual cortex is introduced. It is shown that a basic cortical architecture of recurrent local excitation and lateral inhibition can account quantitatively for such properties as orientation tuning. Non-local coupling between similar orientation patches, when added to the model, can satisfactorily reproduce such effects as non-local iso-orientation suppression, and non-local cross-orientation enhancement. Following this an account is given of perceptual phenomena such as the direct and indirect tilt illusions.
KeywordsReceptive Field Lateral Inhibition Test Line Orientation Tuning Horizontal Connection
Unable to display preview. Download preview PDF.
- Victor, J.D., Purpura, K., Katz, E. and Mao. B., Population encoding of spatial frequency, orientation and color in macaque VI, J. Neurophysiol., 72 No 5, (1994).Google Scholar
- Carpenter, R.H.S. and Blakemore, C.,Interactions between orientations in human vision, Expl. Brain. Res., 18, 287–303, (1973).Google Scholar