Spontaneous inversion of nystagmus without a positional change in the horizontal canal variant of benign paroxysmal positional vertigo

被引:8
|
作者
Ogawa, Yasuo [1 ]
Ichimura, Akihide [1 ]
Otsuka, Koji [1 ]
Hagiwara, Akira [1 ]
Inagaki, Taro [1 ]
Shimizu, Shigetaka [1 ]
Nagai, Noriko [1 ]
Itani, Shigeto [1 ]
Suzuki, Mamoru [1 ]
机构
[1] Tokyo Med Univ, Dept Otorhinolaryngol, Tokyo 1608402, Japan
来源
JOURNAL OF VESTIBULAR RESEARCH-EQUILIBRIUM & ORIENTATION | 2015年 / 25卷 / 3-4期
关键词
Horizontal canal BPPV; lateral canal BPPV; positional nystagmus; benign paroxysmal vertigo;
D O I
10.3233/VES-150552
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
OBJECTIVE: We investigated the neuro-otological findings, including nystagmus, and the clinical course of patients with the horizontal canal variant of benign paroxysmal positional vertigo (HC-BPPV), who showed spontaneous inversion of nystagmus without a positional change. Furthermore, we speculated on the possible mechanism of spontaneous inversion of nystagmus without a positional change. PATIENTS AND METHODS: The characteristics of spontaneous inversion of positional nystagmus without a positional change were analyzed in 7 patients with HC-BPPV. RESULTS: All patients were diagnosed as having HC-BPPV. During the positional test, the spontaneous inversion of nystagmus was observed in the same head position in all patients. Spontaneous inversion was observed on both sides in 5 patients, and only on 1 side in 2 patients. All patients presented with geotropic nystagmus in the first phase, and ageotropic nystagmus in the second phase. CONCLUSIONS: The coexistence of cupulolithiasis and canalolithiasis appears to be a possible mechanism of the spontaneous inversion of positional nystagmus.
引用
收藏
页码:169 / 175
页数:7
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