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Research in Vestibular Science > Volume 10(1); 2011 > Article
Research in Vestibular Science 2011;10(1): 7-11.
전정신경염에서 소음자극에 의한 반대측 유발이음향방사의 억제
, , , 우훈영1, 손정협2, 유영삼1, 최정환1
인제대학교 의과대학 상계백병원 이비인후과학교실1, 공군 제3훈련비행단 항공의무대대2
Contralateral Suppression of Transient Evoked Otoacoustic Emission in Vestibular Neuritis
Hoon Young Woo, Jung Hyeob Sohn, Young Sam Yoo, Jeong Hwan Choi
1Department of Otolaryngology-Head and Neck Surgery, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea. why@paik.ac.kr
2Aero-medical Corp., The 3rd Flight Training Wing, ROKOF, Sacheon, Korea.
ABSTRACT
Background and Objectives:   The etiology of vestibular neuritis is unknown. Many investigators have suggested that this condition spares the inferior vestibular nerve system. However, others have reported that the lesion sometimes affects the inferior vestibular nerve system based on vestibular evoked myogenic potential. The function of the inferior vestibular nerve was studied in acute vestibular neuritis by monitoring medial olivocochlear bundle (MOCB) function. Under normal conditions, contralateral acoustic stimulation has inhibitory effects on ipsilateral otoacoustic emissions through the MOCB.
Materials and Methods:  
Twenty patients that presented with dizziness and spontaneous nystagmus, and were confirmed to have acute vestibular neuritis by rotatory chair and caloric testing were enrolled in this study. We evaluated the evoked otoacoustic emissions with and without contralateral acoustic stimulation in both ears in all patients. The percent loss of normal inhibitory action on otoacoustic emissions was determined in the normal and affected ears.
Results:  
All patients showed inhibitory effects in response to contralateral acoustic stimulation on evoked otoacoustic emissions in normal ears. Fifteen patients (75%) had an absence of contralateral suppression of otoacoustic emissions on the affected side.
Conclusion:  
The findings of this study suggest the presence of dysfunction of the MOCB in patients with acute vestibular neuritis.
Keywords: Acute vestibular neuritis; Caloric tests; Acoustic stimulation; Otoacoustic Emission; Vestibular nerve
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Follow-up Changes of Eye Movements by Caloric Stimulation in Patients With Vestibular Neuritis  2008 June;7(1)
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