射影学習を用いたKohonen modelによるDirection Mapの形成

抄録

Neurons in the primary visual cortex respond selectively to the orientation of edges and their direction of motion. Recently, the arrangement of direction preference was revealed in ferret cortical area 17 and in cat cortical area 18; it was a mosaic-like map. It was found that some iso-orientation domains are subdivided into selective regions for the opposite direction of motion. We used a variation of Kohonen's SOM, which uses projection learning, to form a direction map with an orientation map. This SOM was observed to form opposite direction selectivity sub-domains in iso-orientation domains.