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Updated: Aug 24, 2026
Three Dimensional Vestibular Ocular Reflex Testing Using a Six Degrees of Freedom Motion Platform
Published on: May 23, 2013
Immediate and Short-Term Therapeutic Results Between Direction-Changing Positional Nystagmus with Short- and
Jae Ho Ban1, Min-Beom Kim, Seok Min Hong
11Department of Otorhinolaryngology-Head and Neck Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea; and 2Department of Otorhinolaryngology-Head and Neck Surgery, Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea.
Objectives:
Clinicians sometimes treat patients with relatively long-duration geotropic direction-changing positional nystagmus (DCPN), without latency. Recently, the concept of a "light cupula" in the lateral canal that reveals persistent geotropic DCPN has been introduced. In the present study, we investigated the immediate and short-term therapeutic findings in long-duration DCPN.
Design:
The authors prospectively compared the therapeutic efficacy of a canalith-repositioning procedure (CRP) in short- and long-duration geotropic DCPN.
Results:
In patients with long-duration DCPN, the authors found no immediate therapeutic effect, and the number of patients showing short-term effects (on the next day) was very low compared with the comparable figure among those with short-duration DCPN. In addition, no cases exhibited canal conversion after the CRP.
Conclusion:
Our results suggest that CRP is not useful in patients with long-duration geotropic DCPN, and the pathogenesis of long-duration geotropic DCPN may not originate from free-floating debris but from deflection of the cupula.
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