Research in Vestibular Science

Nystagmus and Saccadic Oscillations: Kim Ji-Soo; J Korean Bal Soc. 2002;1(1):3-17.

Otologic Aspects of Vertigo: Hyun-Min Park; J Korean Bal Soc. 2002;1(1):21-23.

Neurological Aspect of Vertigo: Byung-Kun Kim, M.D.; J Korean Bal Soc. 2002;1(1):24-33.

Psychiatric aspect of Vertigo: Kyung-Kyu Lee, M.D.; J Korean Bal Soc. 2002;1(1):34-43.

Magnetic Resonance Imaging of Vertigo: Hyung-Jin Kim, M.D.; J Korean Bal Soc. 2002;1(1):44-48.

Physiological characteristics of the peripheral vestibular receptor: Byung Rim Park; J Korean Bal Soc. 2002;1(1):51-54.

Central Mechanisms of the Vestibulo-Ocular Reflex (VOR): Ki-Bum Sung; J Korean Bal Soc. 2002;1(1):55-56.

Diagnosis of the vertical semicircular canal type BPPV: Jae Il Kim, M.D.; J Korean Bal Soc. 2002;1(1):67-71.

Benign paroxysmal positional vertigo of lateral semicircular canal: Hyoung Il Rho, M.D.; J Korean Bal Soc. 2002;1(1):72-77.

Central positinal vertigo: Hyung Lee, M.D.; J Korean Bal Soc. 2002;1(1):78-82.

Physical Therapy of Otolithic positional vertigo: Gyu-Cheol Han; J Korean Bal Soc. 2002;1(1):83-91.

Treatment outcome of two different methods of canalith repositioning maneuver: Byung-Kun Kim, M.D.; J Korean Bal Soc. 2002;1(1):97-102.

Abstract PDF: Background
and Objectives: Canalith repositioning procedure described by Epley is an effective treatment of benign paroxysmal positional vertigo (BPPV) based on the theory of canalithiasis. Although there are many modifications of Epley's maneuver, they have much similarity and are usually composed of 4 steps. However there is considerable variation of pause at each position from 6 seconds to 4 minutes. The purpose of this study is to determine treatment outcome of short and long pause at each position. Materials and Methods: This is a randomized prospective study of patients with posterior canal type BPPV. One hundred patients were randomized to one of two groups at their first clinic visit between March 1999 and September 2000. The diagnosis was based on typical findings of vertigo and nystagmus by Dix-Hallpike maneuver and head turning in supine position. The authors treated patients with two different methods of the canalith repositioning procedure. One group maintained each position until the nystagmus stopped. If no nystagmus was observed, the position was maintained for 5 to 10 seconds. The other group maintained each position for 3 minutes. We assessed treatment outcomes of two methods.
Results
We can not find the difference of a success rate between two groups.
Conclusion
It takes less than one minute with rapid head position changing method, so this method is more feasible in out-patients clinics.

Clinical Analysis of Bilateral Vestibulopathy: Chung Ku Rhee, M.D.; J Korean Bal Soc. 2002;1(1):103-107.

Abstract PDF: From retrospective review of medical charts of patients diagnosed as bilateral vestibulopathy during the past seven years, this study investigated incidence, etiologies, symptoms, vestibular function test findings; electronystagmography (ENG) studies, rotatory chair testing, and posturography, and post-vestibular rehabilitation (VRT) follow-up results. we have an incidence of 1.2% of all the 3423 patients who have undergone vestibular function test. Ototoxicity was the first known etiology and we had a lot of patients of idiopathic bilateral vestibulopathy. Most patients in our study had experiences of sudden onset vertigo rather than slowly progressive symptoms. The most frequently complained symptoms were dysequilibrium and oscillopsia. Post-VRT courses were better in patients whose initial gain of vestibulo-ocular reflex(VOR) was high or ascending type.

Galvanic Nystagmus in Normal Person: Woon Kyo Chung, Ju Hyoung Lee, Soo Chan Kim, Ki Chang Nam, Deok Won Kim, Won Sang Lee; J Korean Bal Soc. 2002;1(1):108-112.

Abstract PDF: Background
and objectives: Vestibulo-ocular reflex and vestibulo-spinal reflex are induced by transmatoid galvanic stimulation of vestibular system. Nystagmus and body sway are result of each reflex. Recently, videooculograph possible to record a minute ocular movement was commonly used, vestibulo-ocular reflex induced by galvanic simualtion is easily documented. The purposes of this study are to evaluate the galvanic nystagmus in nomal persons in order to better understand the physiology of the vestibular system. Materials and methods: Eye movement of 20 neurootologic normal subjects by both side transmstoid galvanic stimulation (40cases) were analyzing by videonystagmography.
Result
The direction of nystagmus in fast phase was to the negative electrode. Galvanic nystagmus was occured all normal subjects when stimulus intensity was more than 2mA. There was positive correlation between slow phase velocity(SPV) and electric current but negative correlation was noted between asymmery of SPV and electric current.
Conclusion
It is suggested that the galvanic nystagmus test could be a new diagnostic tool for evaluation of vestibular status.

A New Treatment Strategy of Ageotrophic Horizontal Canal Benign Paroxysmal Positional Vertigo: Gyu Cheol Han, Hyung Gyu Jeon, Jin Myung Huh; J Korean Bal Soc. 2002;1(1):113-117.

Abstract PDF: Background
and Objectives : Ageotrophic nystagmus in the horizontal canal BPPV has been explained as a result of cupulolithiasis theory, and has been reported to have the less therapeutic response to conservative rehabilitations than the other type BPPV . Though methods to detach the debris with vibrator have been introduced, the effect has been questioned and it’s not physiologic. Materials and Method : We introduce a new head shaking-forced prolonged position method as a more convenient method, and report typical 2 cases of ageotrophic horizontal canal BPPV managed with it and analyzed results of 25 cases all told.
Results
and conclusion : The average number of rehabilitation was less than two, and loss of direction changing positional nystagmus could be observed immediately after rehabilitation.

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