Linsenmeier R A, Frishman L J, Jakiela H G, Enroth-Cugell C
Vision Res. 1982;22(9):1173-83. doi: 10.1016/0042-6989(82)90082-7.
The contrast sensitivity to gratings drifting at 2.0 Hz has been measured for X and Y type retinal ganglion cells, and these data have been used to characterize the sizes and peak sensitivities of centers and surrounds. The assumption of Gaussian sensitivity distributions is adequate for both types of cells, but allows a better description of X than of Y cells. The size and peak sensitivity can be specified more precisely, in general, for the center than for the surround. The data also show that for both types of cells (1) center radius increases with eccentricity, but is two to three times larger than Y cells than for X cells at a given eccentricity, (2) spatial resolution is an excellent predictor of center size, (3) the larger the center or surround, the lower its small spot sensitivity at a specific mean lumminance and (4) the surround is nearly as strong as the center for large or diffuse stimuli. X cell surrounds are relatively weaker in the middle of the receptive field than Y cell surrounds, but X cell surrounds are larger relative to their centers.
已测量了X型和Y型视网膜神经节细胞对以2.0赫兹漂移的光栅的对比敏感度，这些数据已用于表征中心和周边的大小及峰值敏感度。高斯敏感度分布的假设对这两种类型的细胞都适用，但对X型细胞的描述比对Y型细胞的描述更好。一般而言，中心的大小和峰值敏感度比周边能更精确地确定。数据还表明，对于这两种类型的细胞：（1）中心半径随离心率增加，但在给定离心率下，Y型细胞的中心半径比X型细胞大两到三倍；（2）空间分辨率是中心大小的极佳预测指标；（3）中心或周边越大，在特定平均亮度下其对小光斑的敏感度越低；（4）对于大的或弥散的刺激，周边的强度几乎与中心一样强。X型细胞的周边在感受野中部比Y型细胞的周边相对较弱，但X型细胞的周边相对于其中心更大。
