Abstract：Objective To evaluate the classification of vestibular neuritis (VN) and involvement of the superior vestibular nerve (SVN)and inferior vestibular nerve (IVN).Methods Sixty patients diagnosed with vestibular neuritis in our department and 30 normal persons as healthy control group were included in our study. Ocular vestibular-evoked myogenic potential (oVEMP) test,cervical vestibular-evoked myogenic potential (cVEMP) test and caloric test were carried out in all the patients and healthy control group. Caloric test was used to measure the horizontal semicircular canal, oVEMPs were used to measure the function of the utricular and superior vestibular nerve, while cVEMPs were used to evaluate the function of the saccule and inferior vestibular nerve.Results VN selectively involved the superior vestibular nerve in 46 patients, affected the inferior vestibular nerve in twelve and damaged both superior and inferior vestibular nerve branches in two. The abnormal extraction rate of VEMPs of vestibular neuritis group was higher than in control group, and the difference was statistically significant. There was no significant difference in the latency of oVEMPs between patients in superior vestibular nerve group and healthy control group, whereas the amplitude and asymmetry ratio were significantly different. There was no significant difference between the healthy side and the healthy control group, but the difference was statistically significant in caloric test. However, there was no significant difference in the latency and amplitude of oVEMPs between patients in inferior vestibular nerve group and healthy control group. There was no correlation between the CP value of caloric test and the vestibular nerve. Patients with abnormal cVEMPs and normal oVEMPs and caloric test represented the inferior vestibular nerve.Conclusions Vestibular neuritis mostly involves the superior portion of the vestibular nerve. cVEMPs, oVEMPs and caloric test can provide more detailed localization of vestibular nerve damage.
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2017, Vol. 28 
