Table of Contents
ISRN Otolaryngology
Volume 2012, Article ID 246065, 5 pages
http://dx.doi.org/10.5402/2012/246065
Clinical Study

Vestibular Hearing and Neural Synchronization

1Department of Audiology, School of Rehabilitation, Hamadan University of Medical Sciences, Hamadan 16657-696, Iran
2ENT-Head and Neck Research Center, Hazrat Rasoul Akram Hospital, Tehran University of Medical Sciences, Tehran 14455-364, Iran

Received 19 December 2011; Accepted 3 January 2012

Academic Editors: S. Kanzaki and M. Sone

Copyright © 2012 Seyede Faranak Emami and Ahmad Daneshi. 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

Objectives. Vestibular hearing as an auditory sensitivity of the saccule in the human ear is revealed by cervical vestibular evoked myogenic potentials (cVEMPs). The range of the vestibular hearing lies in the low frequency. Also, the amplitude of an auditory brainstem response component depends on the amount of synchronized neural activity, and the auditory nerve fibers' responses have the best synchronization with the low frequency. Thus, the aim of this study was to investigate correlation between vestibular hearing using cVEMPs and neural synchronization via slow wave Auditory Brainstem Responses (sABR). Study Design. This case-control survey was consisted of twenty-two dizzy patients, compared to twenty healthy controls. Methods. Intervention comprised of Pure Tone Audiometry (PTA), Impedance acoustic metry (IA), Videonystagmography (VNG), fast wave ABR (fABR), sABR, and cVEMPs. Results. The affected ears of the dizzy patients had the abnormal findings of cVEMPs (insecure vestibular hearing) and the abnormal findings of sABR (decreased neural synchronization). Comparison of the cVEMPs at affected ears versus unaffected ears and the normal persons revealed significant differences ( 𝑃 < 0 . 0 5 ). Conclusion. Safe vestibular hearing was effective in the improvement of the neural synchronization.