Cleland B G
J Physiol. 1983 Dec;345:15-26. doi: 10.1113/jphysiol.1983.sp014962.
The responses of brisk-sustained (X) and brisk-transient (Y) cat retinal ganglion cells to small stationary spots flashing on and off in their receptive fields were recorded. Response magnitudes were determined as the amplitude of the fundamental frequency component. At 0.5 and 8 Hz the sensitivity of brisk-sustained cells is independent of the size of their receptive field centre, with the mean sensitivity at 0.5 Hz being 16% lower than at 8 Hz. At 8 Hz the sensitivity of brisk-transient cells is inversely proportional to the centre diameter of their receptive fields. The relationship is quite different from that found in brisk-sustained cells. The ratio of the sensitivity at 0.5 Hz to the sensitivity at 8 Hz can be used as a measure of the 'sustainedness' of a ganglion cell. Using this measure brisk-sustained cells show no change in their sustained nature as a function of eccentricity. In contrast, brisk-transient cells appear to become increasingly transient with eccentricity. Within the area centralis the sensitivities of brisk-transient cells at 0.5 and 8 Hz are very similar to the sensitivities of brisk-sustained cells, and hence they have a very obvious sustained component to a light flashed on and off at low frequency. These brisk-transient units meet all other criteria of their class and so there can be no question as to their classification.
记录了猫的瞬态持续型（X）和瞬态快速型（Y）视网膜神经节细胞对其感受野中闪烁的小静止光斑的反应。反应幅度确定为基频成分的幅度。在0.5 Hz和8 Hz时，瞬态持续型细胞的敏感性与其感受野中心的大小无关，0.5 Hz时的平均敏感性比8 Hz时低16%。在8 Hz时，瞬态快速型细胞的敏感性与其感受野中心直径成反比。这种关系与瞬态持续型细胞中的情况大不相同。0.5 Hz时的敏感性与8 Hz时的敏感性之比可作为神经节细胞“持续性”的一种度量。使用这种度量方法，瞬态持续型细胞的持续特性不会随离心率而变化。相比之下，瞬态快速型细胞似乎随着离心率的增加而变得越来越具有瞬态性。在中央凹区域内，瞬态快速型细胞在0.5 Hz和8 Hz时的敏感性与瞬态持续型细胞的敏感性非常相似，因此对于低频闪烁的光，它们具有非常明显的持续成分。这些瞬态快速型单元符合其类型的所有其他标准，因此它们的分类毫无疑问。
