A NEW COMPUTATIONAL MODEL OF RETINAL GANGLION CELLRECEPTIVE FIELDS I.A MODEL OF GANGLION CELL RECEPTIVE FIELDS WITHEXTENDED DISINHIBITORY AREA
视网膜神经节细胞感受野的一种新模型 I.含大周边的感受野模型

Receptive field (RF) is the basic structural and functional unit for signal processing in visual system. X cell and Y cell are two main kinds of retinal ganglion cell. It was shown that there is a large disinhibitory area outside the classical receptive field. Inspired by the unified X and Y cell model proposed by P. Gaudiano, we build a two dimensional model with nonlinear interaction between the large disinhibitory area and the inhibitory surround. We simulated the null-test response of the X cell and the on-off response of the Y cell, spot area response curves and spatial frequency tuning curves of the X and Y cells. Then we used filter theory to explain the difference between X and Y cell's spatial property and discussed effect of the large disinhibitory area on the spatial property of classical receptive field.