الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Background: BPPV is a peripheral vestibular disorder involving the semicircular canal usually but not exclusively the posterior semicircular canal. It is important to determine the potential contribution of posterior canal BPPV to function of cochlear outer hair cells, by application of Otoacoustic emission (DPOAE and TEOAE) and to investigate changes of pure tone audiometry thresholds in patients suffering from posterior canal BPPV. The aim of the work: To assess the audiological and cochlear reserve in PC-BPPV. Materials & methods: This prospective study involved twenty patients with PC-BPPV. All patients in this study were evaluated by the Dix Hallpike test. Basic audiological evaluations included pure tone audiometry, immittancemetry and otoacoustic emissions (OAE) which included transient-evoked otoacoustic emissions (TEOAE) and distortion product otoacoustic emissions (DPOAE). Results: There was a significant positive correlation between age and pure tone audiometry (PTA) which increased by increase of the age in the studied PC-BPPV patients, also, there was a significant negative relationship only between DPOAE (1 KHz) and PTA(1KHz) but DPOAE at 2, 4, and 8 KHz revealed statistically non-significant difference at all other OAE PTA.