Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524


J. Korean Phy. Soc. 2009; 55(6): 2532-2536

Published online December 15, 2009

Copyright © The Korean Physical Society.

Functional Organization for Direction Preference in Relation to Orientation and Ocular Dominance Maps

MyoungWon Cho, M.Y. Choi


The visual cortex contains overlaid feature maps for orientation preference,ocular dominance, and direction preference, which are shown by experiment to becorrelated with rather than independent of each other.While the characteristics of the ocular dominance map in relation to theorientation preference map are systematically understood by analogy with otherphysical systems having the same topological characteristics, the originalarrangement of direction preference offers a challenge for theories.Here, by extracting features from spatiotemporal input statistics throughspike-timing dependent plasticity, we show how a neuron in the visual cortexacquires direction selectivity, such that the direction tends to be orthogonalto the orientation preference.Based on these results, we propose an abstract model for the joint mapformation and classify what kind of direction preference map can develop inrelation to orientation and ocular dominance maps.

Keywords: Hebbian learning, STDP, Pattern formation, Magnetic anisotropy