Staab J P, Wall C, Robinson F R, Tomko D L
Department of Physiology, School of Medicine, University of Pittsburgh, Pennsylvania.
Aviat Space Environ Med. 1987 Sep;58(9 Pt 2):A189-91.
Asymmetries in the fast and slow components of nystagmus in the cat vertical vestibulo-ocular reflex (VVOR) were analyzed. Sinusoidal pitch stimuli were used in two experimental conditions, one with the animals on their sides and the other with the animals upright. The half-periods of upward and downward slow component position were generally not of equal duration in the on-side condition. Such was not the case for upright pitch where the slow component was symmetric. In addition, the number of fast components in the two directions was not equal with downward-directed predominating regardless of pitch condition. These two results led to the conclusions that gravity plays an essential role in the normal VVOR and fast component asymmetries may be inherent in the reflex.
对猫垂直前庭眼反射（VVOR）中眼震快相和慢相成分的不对称性进行了分析。在两种实验条件下使用正弦俯仰刺激，一种是动物侧卧，另一种是动物直立。在侧卧条件下，向上和向下慢相成分位置的半周期通常持续时间不相等。直立俯仰时情况并非如此，此时慢相成分是对称的。此外，无论俯仰条件如何，两个方向上的快相成分数量都不相等，向下的快相成分占主导。这两个结果得出结论，重力在正常的VVOR中起重要作用，快相成分的不对称性可能是该反射所固有的。
