STANDARDIZATION OF VESTIBULAR EVOKED MYOGENIC POTENTIALS

Objectives: The purpose of this study is to determine the normative data for vestibular-evoked myogenic potentials (VEMP) to use in differential diagnosis. Materials and Methods: We recorded vestibular-evoked myogenic potentials in 32 voluntaries (16 men and 16 women). Electrodes were placed as 1-channel montage: active electrode to the midpoint of the ipsilateral Sternocleidomastoid muscle (SCM), referance electrode to the lower part of the ipsilateral SCM and ground electrode to the forehead. 1000 Hz tone burst stimulus was used. Results: There was no significant difference between male and female subjects and, no significant interaural difference for P13-N23 latency values. P13-N23 latency and amplitude values were determined at 105 dB, 100 dB, 95 dB, 90 dB and 85 dB nHL. The mean VEMP threshold was 91,875 dB nHL. Conclusion: Standard deviation was small for P13-N23 latency values, whereas was large for amplitute values. It was accepted that the latency values could be used for differential diagnosis.