Neurology, Johns Hopkins University, Baltimore, Maryland, USA
Neurology, University of Maryland School of Medicine, Baltimore, Maryland, USA.
Pract Neurol. 2024 Jul 16;24(4):285-288. doi: 10.1136/pn-2023-003772.
Optokinetic nystagmus (OKN) is a reflexive eye movement in response to movement of the viewer's visual environment that consists of a slow phase eye movement in the direction of the stimulus followed by a quick phase in the opposite direction. When tested at the bedside, the slow phases represent smooth pursuit, while the quick phases represent saccades. Normally, OKN is conjugate and symmetric (horizontally and vertically). Abnormalities in the optokinetic response can provide diagnostic and localising value. We describe six clinical scenarios where OKN testing is most useful for the practising neurologist.
视动性眼球震颤（OKN）是一种反射性眼球运动，对观察者视觉环境的运动作出反应，由刺激方向的慢相眼球运动和相反方向的快相眼球运动组成。在床边进行测试时，慢相代表平滑追踪，快相代表扫视。正常情况下，OKN 是共轭和对称的（水平和垂直）。视动反应异常可为临床医生提供诊断和定位价值。我们描述了 6 种临床情况，在这些情况下，OKN 测试对神经科医生最有用。
