Abnormal vestibular evoked myogenic potentials in the presence of normal caloric responses

被引:51
作者
Iwasaki, S
Takai, Y
Ito, K
Murofushi, T
机构
[1] Univ Tokyo, Fac Med, Dept Otolaryngol Head & Neck Surg, Bunkyo Ku, Tokyo 1138655, Japan
[2] Tokyo Postal Serv Agcy Hosp, Dept Otolaryngol, Tokyo, Japan
关键词
vestibular evoked myogenic potential; caloric test; saccule; inferior vestibular nerve;
D O I
10.1097/01.mao.0000194890.44023.e6
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Objective: Combined use of vestibular evoked myogenic potential (VEMP) and caloric response testing has enabled us to examine the function of the inferior and superior vestibular nerves separately. Although results of VEMP testing and caloric response testing have been reported for many diseases, a clinical entity showing abnormal VEMP responses but normal caloric test responses has rarely been reported. The aim of the study was to investigate clinical features of diseases showing abnormal VEMP responses with normal caloric test responses. Study Design: Retrospective. Setting: University hospital. Patients: Eight hundred eleven patients with balance problems who had undergone both caloric response and VEMP testing were included in the study. Main Outcome Measures: The amplitudes and latencies of the first positive-negative peak of the VEMP (p13-n23) were measured. Results: Forty of the 811 patients (5%) were found to have abnormal VEMP responses with normal caloric test responses. Clinical diagnoses of these patients were Meniere's disease (n = 12), acoustic neuroma (n = 8), sudden deafness with vertigo (n = 6), and other diseases (n = 6). Eight patients could not be diagnosed as having a disease already recognized. Clinical manifestations of these eight patients were rotatory vertigo in six patients and non-rotatory dizziness in two. None of these patients showed abnormalities other than VEMP responses on neurologic or neurotologic examinations. Conclusion: Apart from Meniere's disease, acoustic neuroma, and sudden deafness with vertigo, which are already known as diseases with abnormal VEMP responses but normal caloric test responses, some patients might be diagnosed as having a disease that involves only the inferior vestibular nerve region.
引用
收藏
页码:1196 / 1199
页数:4
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