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J Korean Bal Soc > Volume 5(2); 2006 > Article
Journal of the Korean Balance Society 2006;5(2): 299-306.
가쪽반고리관형 양성돌발성체위성현훈에서 초기안진의 양측성 역전
, , , , 서명환1, 김상욱2, 박민현1, 김지수3, 구자원2
보라매병원 이비인후과1, 서울대학교 의과대학 분당서울대학교병원 이비인후과2, 신경과3
Bilateral Inversion of Initial Nystagmus in Benign Paroxysmal Positional Vertigo of Horizontal Canal
Myung Whan Suh, Sang Wook Kim, Min Hyun Park, Ji Soo Kim, Ja Won Koo
1Department of Otolaryngology, Seoul Municipal Boramae Hospital, Seoul, Korea.
2Department of Otolaryngology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea. jwkoo99@snu.ac.kr
3Department of Neurology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
ABSTRACT
Horizontal canal benign paroxysmal positional vertigo (HC-BPPV) is characterized by direction-changing nystagmus of the horizontal component induced by lateral head turning in supine position. Yet, some patients with HC-BPPV show nystagmus inversion during head turning to one side. And, mostly, the nystagmus started in a geotropic direction and the inversion was observed only when the head is turned to the lesion side. Reversal of the clot movement in the canal and sensory adaptation were suggested as the hypothesis for such finding. However, bilateral inversion of geotropic nystagmus into apogeotropic nystagmus in HC-BPPV has seldom been described before. In this paper, the authors presented the characteristic features and progression during reposition of a patient with bilateral nystagmus inversion and speculated its mechanisms. Key Words : Positional vertigo, Semicircular canal, Diagnosis, Nystagmus
Keywords: Positional vertigo; Semicircular canal; Diagnosis; Nystagmus
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