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位置性眼震(PN)是位置性综合征的重要客观表现之一,可出现于前庭系统的各种病损,有助于定位诊断。其特征在很大程度上取决于病损位置、类型、特征和动态变化等因素。但迄今对于前庭紊乱(包括PN及位置性综合征)的发生机制、分型、诊断及鉴别诊断价值等的研究仍很不够,文献中已记载者多各有其优、缺点,而且仅根据PN一个体征作病变定位诊断,无疑会造成误诊。
Posterior nystagmus (PN) is one of the most important objective manifestations of positional syndrome. It can occur in all kinds of lesions in the vestibular system and is helpful for localization diagnosis. Its characteristics depend largely on factors such as lesion location, type, characteristics, and dynamics. However, the research on the mechanism, classification, diagnosis and differential diagnosis value of vestibular disorders (including PN and positional syndrome) is still not enough so far. The records in the literature have their own advantages and disadvantages, and only according to PN A pathological diagnosis for the diagnosis of a sign, will undoubtedly cause misdiagnosis.