Kato I, Nakamura T, Kanayama R, Okada T, Watanabe S
Department of Otolaryngology, St. Marianna University School of Medicine, Kawasaki, Japan.
Acta Otolaryngol Suppl. 1996;522:32-7.
The optokinetic nystagmus (OKN) test has diagnostic values in that it can detect lesioned sites in patients with infratentorial lesions. The test has so far been performed by using angular acceleration to the final velocity over 100 degrees/s, which is time-consuming and inconvenient for patients. In the present study, we tried to modify and simplify the OKN test used previously to give step stimulus of constant stimulus and compared the results in 20 normal subjects. Slow-phase velocity versus stimulus velocity, and fast phase amplitude and peak velocity versus stimulus velocity of OKN were compared between step-stimulus OKN and linear-stimulus OKN. As a result, each parameter showed significantly higher values in step-stimulus OKN than in linear-stimulus OKN. Averaged slow-phase OKN velocity during the first 5 s is sufficient to calculate OKN velocity, and it requires only short time to perform.
视动性眼震（OKN）测试具有诊断价值，因为它可以检测幕下病变患者的病变部位。到目前为止，该测试是通过使用从角加速度到超过100度/秒的最终速度来进行的，这对患者来说既耗时又不方便。在本研究中，我们试图修改和简化先前使用的OKN测试，以给予恒定刺激的阶跃刺激，并比较了20名正常受试者的结果。比较了阶跃刺激OKN和线性刺激OKN之间OKN的慢相速度与刺激速度，以及快相幅度和峰值速度与刺激速度。结果，每个参数在阶跃刺激OKN中显示的值明显高于线性刺激OKN。前5秒内的平均慢相OKN速度足以计算OKN速度，并且只需要很短的时间来执行。
