Demer J L, Robinson D A
Brain Res. 1983 Oct 3;276(1):173-7. doi: 10.1016/0006-8993(83)90560-7.
Models have been proposed for the combined optokinetic system and vestibulo-ocular reflex that share a single, common, velocity-storage element that generates both optokinetic after-nystagmus and prolongs post-rotatory nystagmus. It has been thought by many that such a model requires the time course of these two types of nystagmus to be similar. The demonstration that vestibular or optokinetic habituation can selectively and significantly reduce the duration of each type of nystagmus without affecting that of the other has been taken to imply that the concept of shared velocity storage is incorrect. This need not be the case because post-rotatory nystagmus is described by two time constants, not one. Changes in the model's parameters can create time courses of this nystagmus that, when fit by single exponentials, have apparent time constants quite different from that of optokinetic after-nystagmus. Consequently, a common velocity-storage mechanism is still a tenable hypothesis for optokinetic and vestibular eye movements.
已经有人提出了关于视动系统和前庭眼反射相结合的模型，该模型共享一个单一的、共同的速度存储元件，这个元件既能产生视动性眼震后眼震，又能延长旋转后眼震。许多人认为，这样一个模型要求这两种眼震的时间进程相似。前庭或视动性习惯化能够选择性地、显著地缩短每种眼震的持续时间而不影响另一种眼震的持续时间，这一现象被认为意味着共享速度存储的概念是错误的。但情况未必如此，因为旋转后眼震是由两个时间常数而非一个来描述的。模型参数的变化能够产生这种眼震的时间进程，当用单指数函数拟合时，其表观时间常数与视动性眼震后眼震的表观时间常数截然不同。因此，对于视动性和前庭性眼球运动来说，共同的速度存储机制仍然是一个合理的假设。
