抄録
Peripheral positional vertigo is the most common type of vertigo due to peripheral vestibular lesion. Recently, peripheral positional vertigo is classified according to different lesions of originating in the canal. The posterior canal positional vertigo is so called benign paroxysmal positional vertigo. In horizontal canal positional vertigo of cupulolithiasis, the direction-changing horizontal ageotropic nystagmus is caused by cupulolithiasis, these patients cannot be diagnosed early. In addition, the attack period tends to persist for a few months. Therefore, we developed a new method of a head-shaking in anteflexio while sitting. In this study, two patients with horizontal canal positional vertigo of cupulolithiasis performed anteflexio head-shaking while sitting and were examined using an infrared CCD camera. By anteflexio head-shaking while sitting, we were able to easily transfer horizontal canal positional vertigo of cupulolithiasis to canalolithiasis. Furthermore, positional nystagmus disappeared by the modified Lempert method.
