https://scholars.lib.ntu.edu.tw/handle/123456789/481710
Title: | Vestibular evoked myogenic potential in patients with sudden deafness | Authors: | Wu, C. C. Young, Y. H. |
Keywords: | Sacculo-collic reflex | Sudden deafness | Vestibular evoked myogenic potential (VEMP) | Issue Date: | 1-Dec-2000 | Journal Volume: | 12 | Journal Issue: | 4 | Source: | Tzu Chi Medical Journal | Abstract: | Objective: Vestibular evoked myogenic potential (VEMP) is a newly developed examination for assessing the sacculo-collic reflex which can be induced by a loud tone burst. This study was performed to elucidate the mechanism and pathways of the VEMP. Patients and Methods: Ten patients (3 men and 7 women) with sudden deafness were subjected to a VEMP test by tone burst (95 dBHL, 500 Hz). Results: Nine (90%) of the ten ears with lesions had normal VEMPs, of which seven had a pure tone average of more than 90 dBHL. Four ears had canal palsy, but normal VEMPs. In comparison to wave I (p13) latency, wave II (n23) latency, and wave I-II amplitude showed no differences between the ears with lesions and control ears (16.1±3.0 ms, 21.9±2.2 ms, and 23.6±8.6 μV versus 14.9±2.1 ms, 20.3±1.8 ms, and 27.8±8.7 μV, respectively). Tapping instead of tone burst stimulation successfully evokes a VEMP response in an ear with chronic otitis media. Conclusions: VEMP is generated via the inferior vestibular nerve, which is unrelated to the hearing level or caloric response, but can be attenuated by conductive hearing loss. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/481710 | ISSN: | 10163190 |
Appears in Collections: | 醫學系 |
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