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  • Title: Comparison of head rotation versus head elevation methods for vestibular evoked myogenic potentials by using logon stimulus.
    Author: Ozdek A, Tulgar M, Saylam G, Tatar E, Korkmaz H.
    Journal: Int J Pediatr Otorhinolaryngol; 2009 May; 73(5):645-9. PubMed ID: 19168231.
    Abstract:
    OBJECTIVES: To compare vestibular evoked myogenic potentials (VEMP) between two different methods, head rotation (HR) with unilateral recording and head elevation (HE) with bilateral simultaneous recording. SUBJECTS AND METHODS: Twenty-eight healthy children (56 ears) were involved in the study. The subjects were tested in two different positions: head rotation (HR) method and head elevation (HE) method. Right- and left-side recordings were made separately in HR method and simultaneously in HE method. Logon type stimulus with 120dB Hl intensity was used to trigger VEMPs in both methods. RESULTS: The response rate was 80.4% for HR method and 89.3% for HE method (p>0.05). There was no significant difference between the two groups with respect to P1 latency, N1 latency, and P1-N1 interval. The mean P1-N1 amplitude of HE method was higher than HR method (p<0.05). There were very strong positive correlations between two methods regarding N1 latency and P1-N1 interval (r: 0.849 and 0.841, respectively). CONCLUSION: Bilateral simultaneous VEMP recording in head elevation position by using logon stimulus is a practical way to evaluate vestibulocollic reflex in children and it gives superior results than unilateral recording with head rotation position.
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