頭位眼振の分類とその意義

概要

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Positional nystagmus is one of the valuable vestibular signs for the diagnosis of vertiginous diseases. However, the classification of positional nystagmus has been modified since Nyléns initial classification in 1950. In this paper we review the history and significance of the classification of positional nystagmus, and divide, experimental positional nystagmus of the past 50 years into that of peripheral and central origins. At present, positional nystagmus is generally classified into static and paroxysmal types. We indicate some problems in classifying positional nystagmus, such as observing conditions of nystagmus and the possibility of spontaneous nystagmus occurring, and also introduce a method for differentiating between static and paroxysmal positional nystagmus. Furthermore, with regard to typical positional nystagmus such as BPPV and its variants, static direction-changing positional nystagmus and downbeating positional nystagmus, we discuss the etiology, pathophysiology, and localization of lesions.
日本めまい平衡医学会の論文
2000-08-01