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Enhanced response obtainability with chirp stimulus in bone-conducted mVEMPs
Ceren Karaçaylı1,2, Ercan Karababa3, Emine Ceren Ersöz Ünlü4
1Department of Audiology, University of Health Sciences, Gülhane Facultyof Health Science, Gülhane Eğitim ve Araştırma Hastanesi KBB AD, Ankara, Turkey. ckaracayli@yahoo.com.
Purpose:
Masseter vestibular-evoked myogenic potentials (mVEMPs) assess vestibular function through the vestibulo-masseteric reflex. While tone burst (TB) stimuli are commonly used, narrowband chirp stimuli may improve response rates and neural synchronization. This study compares the effectiveness of TB and chirp stimuli in bone-conducted mVEMP testing.
Methods:
Thirty-five healthy participants (70 ears) underwent mVEMP testing using a bone conduction vibrator. We evaluated response obtainability, P1 and N1 latencies, and P1-N1 amplitude in bone-conducted mVEMPs using 500 Hz TB and 500 Hz narrowband level-specific (NB LS) chirp stimuli.
Results:
The response rate for the NB LS chirp stimulus (80.0%) was significantly higher than that for the TB stimulus (42.9%) (p < 0.001). Logistic regression analysis indicated that the likelihood of obtaining a response with chirp stimuli was 5.333 times higher than with TB stimuli (p < 0.001). Additionally, chirp stimuli produced significantly shorter latencies and higher amplitudes (p < 0.001).
Conclusion:
In bone-conducted mVEMPs, NB LS chirp stimuli improve response rates, shorten latencies, and increase amplitudes, suggesting greater reliability and efficiency in vestibular assessment.
