SIMULATION OF SPATIAL TRANSFER PROPERTIES OF CAT RETINAL GANGLION CELL
视网膜神经节细胞空间传输特性的模拟

Based on a new model of ganglion Cell in Which the inhibitory interactions among subunits of surrounded area of the receptive field (RF) were taken into account, the spatial transfer propCrties of ICtinal ganglion Cells were simulated. By changing either the sensitivity, or the effective range of the inhibitory intCractions, the various area-summation functions were approximated. Tested with a sinusoidal grating consisted of increasing spatial frequencies, the model transferred not only the high frequenCy components (as it was shown by the DOG model), but also the low spatial frequened which were attenuated in the DOG model by the antagonistic inteMCtion between and surround. Moreover, on the basis of the inhibitory interaCtions, the phenomenon that the size of RF and the strength of responses were dependent on the dispersion (density) of background dots can also be Well explained.