McClure J A
J Otolaryngol. 1985 Feb;14(1):30-5.
Benign paroxysmal vertigo (BPV) is generally attributed to a differential density condition in the posterior semicircular canal. Although the posterior canal is implicated because of its dependent position, the possibility exists that either the horizontal or superior canal could become involved. This paper reports on seven patients with a clinical picture consistent with horizontal canal BPV. The characteristic features are brief vertigo and horizontal nystagmus precipitated by head movement into or out of one of the lateral positions. Position change toward the left lateral position induces left beating nystagmus and vice versa for position change toward the right. The direction of the nystagmus indicates a utriculopetal "endolymph flow" when the affected horizontal canal is undermost. This could be explained by particle movement or a "viscous plug" in the posterior aspect of the canal.
良性阵发性眩晕（BPV）通常归因于后半规管的密度差异状况。尽管后半规管因其依赖的位置而受到牵连，但水平半规管或上半规管也有可能受累。本文报告了7例临床表现与水平半规管BPV相符的患者。其特征性表现为头部向一侧侧卧位进出时诱发的短暂眩晕和水平眼震。向左卧位改变时诱发向左跳动的眼震，向右卧位改变时则相反。当患侧水平半规管处于最下方时，眼震方向表明存在向椭圆囊的“内淋巴流动”。这可以通过半规管后部的颗粒运动或“粘性栓子”来解释。
