Table of Contents
ISRN Otolaryngology
Volume 2013, Article ID 161937, 4 pages
http://dx.doi.org/10.1155/2013/161937
Clinical Study

Ocular Vestibular Evoked Myogenic Potential Using Different Test Stimuli

Department of Audiology & Speech Language Pathology, Kasturba Medical College, Manipal University, Mangalore 575 001, India

Received 17 June 2013; Accepted 11 July 2013

Academic Editors: C. Y. Chien and M. Reiß

Copyright © 2013 Dessai Teja Deepak et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Aim. Ocular Evoked Myogenic Potential (oVEMP) are short latency potentials evoked by higher acoustic stimulation. In this study, we aimed at comparing the click, 500 Hz mixed modulated, and 500 Hz short duration tone burst stimuli using oVEMP. Material. Click, 500 Hz mixed modulated and 500 Hz short duration tone burst stimuli were used for the study. Method. Conventional sampling and conveneint study design were used. Sixty healthy subjects underwent contralateral oVEMP testing maintaining 30 degrees upward gaze. Single channel electrode montage was applied to record oVEMP response. Results. On statistical analysis the three stimuli evoked equal response rates (100%), and when latency of n1 and p1 and peak-peak amplitude were compared, the click evoked showed significantly early latency and lower peak-peak amplitude than the 500 Hz stimuli. Five hundred Hz stimuli did not show significant difference in latency and peak-peak amplitude of n1-p1. Discussion. Thus, 500 Hz stimuli can evoke better latency and peak-peak amplitude. oVEMP has good clinical significance in diagnosing subjects with vestibular dysfunction. To add to the sensitivity of the oVEMP test, 500 Hz stimuli may also be used as it can evoke better oVEMP responses in clinical population with good morphology.