Study of the relationship between cVEMP and ABR 500 Hz

Abstract

ObjectiveTo evaluate the possible contribution of the saccular projections in generation ABR 500 Hz at high intensity by investigating the relationship between cVEMP and ABR 500 Hz in normal subjects and those with unilateral saccular dysfunction. SubjectsTwenty dizzy adults with unilateral affected cVEMP compared to twenty healthy subjects. MethodsAll subjects were subjected to basic audiological evaluation (pure tone audiometry, speech audiometry and immittancemetry), cVEMP and ABR using 500 Hz tone burst at 90 dB nHL. The dizzy patients within the study group were subjected to VNG to exclude another vestibular affection. The resultsWe found that patient’s abnormal cVEMPs response mostly had prolonged ABR 500 Hz wave V latency, whereas unaffected ears presented with normal findings. ConclusionUsing ABR 500 Hz in the battery approach tests of vestibular assessment can produce valuable data for judgment on the site of a lesion.