A model of angle selectivity development in visual area V2

Authors:
Alessio Plebe
Affiliations:
Department of Cognitive Science, University of Messina, Italy
Venue:
Neurocomputing
Year:
2007

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Abstract

The role of area V2 in visual processing is still almost unexplored. Recently the selectivity of V2 neurons in the macaque to stimuli consisting of angled lines has been studied systematically, responses were definitely selective in one-fourth of neurons. In this work the emergence of a computational organization supporting similar responses is explored, using an artificial model of cortical maps. This model, called LISSOM (Laterally Interconnected Synergetically Self-Organizing Map), includes excitatory and inhibitory lateral connections. In this simulation two LISSOM maps are arranged as V1 and V2 areas, in the first area the classical domains of orientation selectivity will develop, while in V2 several neurons become sensitive to pairs of angled segments. The stimuli experiences favoring both developments are investigated.