Fig. 52

The simulation model for developmental mechanism of salt-and-pepper map by feedforward convergence between retina and V1. A Moiré interference between ON and OFF RGC mosaics. B Moiré interference with small and large alignment angles can generate various range of periodicity, S. C From rat RGC mosaics, both smooth and salt-and-pepper map can be developed. D Spatial distribution of preferred orientations of V1 cells by different convergence conditions; Smooth map model (high sampling ratio and large convergence range), Salt-and-pepper map model (low sampling ratio and short convergence range). E The structure of orientation map depending on convergence range and sampling ratio