Browsing by Author "Gencturk, Ertugrul"

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Evaluation of the Descriptive Values and Occlusion Effects of Air and Bone Conducted Cervical Vestibular Evoked Myogenic Potentials in Normal Individuals
(Springer, 2022) Tasci, Betul; Gencturk, Ertugrul; Serbetcioglu, Mustafa Bulent
Objective:This study was aimed to establish the descriptive statistical values of cVEMPs's responses which are evoked by air and bone conducted stimuli and to examine the effects of occlusion on bone conducted (BC) cVEMPs test. Methods:The study was carried out on 20 individuals (n = 40 ears), 11 women and 9 men, at the Medipol Mega University Hospital. cVEMPs tests were applied in five stages to the individuals who are volunteer to participate in this study. Firstly, the air conducted (AC) cVEMPs test was applied. Then, BC cVEMPs tests were applied in four different conditions with the aim of examining the occlusion effect. Results:Latency values of the AC cVEMPs response were 15.17 +/- 0.77 ms for P1 and 24.12 +/- 1.38 ms for N1 and 8.95 +/- 1.12 ms for interpeak latencies. P1N1 amplitude value was 149.73 +/- 75.00 mu V. VEMPs asymmetry ratio (VAR) was 0.16 +/- 0.16. Latency measurements of the BC cVEMPs response were 14.38 +/- 0.85 ms for P1 and 23.40 +/- 1.50 ms for N1 and 9.05 +/- 1.57 ms for interpeak latencies. P1N1 amplitude value was 107.58 +/- 54.08 mu V. VAR was 0.15 +/- 0.12. Both AC cVEMPs and BC cVEMPs parameters were demonstrated that there are not any significant differences between female-male and left ear-right ear. When AC and BC cVEMPs responses were compared, the mean P1 and N1 latencies of BC cVEMPs were significantly shorter than those of AC cVEMPs (p < 0.01). The mean amplitudes of AC cVEMPs were significantly larger than those of BC cVEMPs (p < 0.01). When the impact of the occlusion effect on cVEMPs parameters was examined, no statistical significance was found. Conclusion:As a result, it was thought that the BC cVEMPs, which is not widely used in clinics, might be used in the vestibular assessment of conductive hearing losses (CHL) in clinics, by obtaining descriptive values with this study. In addition, it was thought that it might be used as an auxiliary test to diagnose patients with hyperacusis who are disturbed by loud noises.
Normalization of Masseter VEMP and Comparison with Cervical VEMP in Normal Individuals
(Springer, 2023) Kilinc, Ezgi; Gencturk, Ertugrul; Tasci, Betul; Serbetcioglu, Mustafa Bulent
ObjectiveThe objective of this study is to obtain normative data of the masseter vestibular-evoked myogenic potential (mVEMP) test in healthy individuals without hearing loss and dizziness and to compare the responses with the cVEMP test.MethodsTwenty healthy individuals (10 males and 10 females) aged 20-30 years without auditory and vestibular disorders participated in the study. First, mVEMP and then cVEMP tests were applied to the individuals who voluntarily participated in the study.ResultsLatency values of the air-conducted mVEMP were 15.90 +/- 1.68 ms for P1 and 25.86 +/- 1.48 ms for N1 and 9.96 +/- 1.50 ms for interpeak latencies. P1N1 amplitude value was 97.89 +/- 37.34 mu V and asymmetry ratio (AR) was 0.13 +/- 0.07. The normative data for the mVEMP threshold was found 84 dB nHL. According to the gender difference in mVEMP measurement parameters, the P1 latency of women was found shorter than the P1 latency of men at all stimulus intensities except 90 dB nHL. There was no statistically significant difference between mVEMP and cVEMP test results in all other severity and all parameters except P1 latency at 100 dB and interpeak latency at 100 dB (p > 0.05).ConclusionIn conclusion, it was the study findings suggest that obtaining normative data on mVEMP could be used as an auxiliary test in the evaluation of the vestibular and trigeminal pathway and the evaluation of patients with various peripheral and central vestibular disorders.