Hamasaki D I, Sutija V G
Exp Brain Res. 1979 Mar 9;35(1):25-36. doi: 10.1007/BF00236782.
A contrast reversal (alternating phase) stimulus was used to study the responses of 150 retinal ganglion cells from 15 adult cats. Because the majority of the cells did not show perfect linear spatial summation, a ratio of the firing rates at two time periods was used to express the degree of nonlinearity. Y-cells showed a high degree of nonlinearity, and their mean null ratio was significantly lower than that of X-cells. With the stimulus at the null position, X-cells had an unmodulated discharge rate which was significantly higher than maintained activity, while the firing rate of Y-cells was lower than maintained activity. With the stimulus placed at an eccentric position in the receptive field, X-cells responded in a sustained manner, while Y-cells respond transiently. Because of these observations, we conclude that X-cells correspond to the sustained cells, while Y-cells correspond to the transient cells.
使用对比反转（交替相位）刺激来研究15只成年猫的150个视网膜神经节细胞的反应。由于大多数细胞未表现出完美的线性空间总和，因此使用两个时间段的放电率之比来表达非线性程度。Y细胞表现出高度的非线性，其平均零比率明显低于X细胞。在零位置施加刺激时，X细胞的未调制放电率明显高于维持活动时的放电率，而Y细胞的放电率低于维持活动时的放电率。当刺激置于感受野的偏心位置时，X细胞以持续方式做出反应，而Y细胞则以瞬态方式做出反应。基于这些观察结果，我们得出结论，X细胞对应于持续细胞，而Y细胞对应于瞬态细胞。
