Thomson W D, Saunders J E
Ophthalmic Physiol Opt. 1984;4(2):115-22.
Optokinetic nystagmus (OKN) was induced by using a modified projector system to provide a moving pattern of irregular spots of light. A systematic electro-oculographic study of horizontal and vertical OKN for a series of stimulus velocities from 10 to 100 degrees s-1 was conducted on 10 healthy young subjects. It was found that the vertical responses, in particular to upward-moving stimuli, were less well sustained at velocities above 30 degrees s-1 than the horizontal responses. In view of these observations, care should be taken in the interpretation of OKN results clinically, and only when the response is absent in one direction or an extreme asymmetry is present should clinical significance be attached. This applies particularly for the vertical OKN responses. Clearly, the use of stimulus velocities below 40 degrees s-1 is advised and the standard suggested by Holm -Jensen and Peitersen [Acta oto-lar. 88, 110-116 (1968)] of a target moving at 20 degrees s-1 seems a reasonable choice.
通过使用改良的投影仪系统来提供不规则光斑的移动模式，诱发视动性眼震（OKN）。对10名健康年轻受试者进行了系统的眼电图研究，研究了一系列从10至100度/秒的刺激速度下水平和垂直OKN的情况。结果发现，在速度高于30度/秒时，垂直反应，尤其是对向上移动刺激的反应，比水平反应的持续性要差。鉴于这些观察结果，在临床解释OKN结果时应谨慎，只有当一个方向上没有反应或存在极端不对称时，才应赋予其临床意义。这尤其适用于垂直OKN反应。显然，建议使用低于40度/秒的刺激速度，而Holm-Jensen和Peitersen[《耳鼻咽喉学报》88, 110 - 116 (1968)]所建议的目标以20度/秒移动的标准似乎是一个合理的选择。
