1. Vestibular Evoked Myogenic Potential in Cases of Vestibular Schwannomas.
- Author
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El Garem, Hani, El Gafy, Rania, Mourad, Mona, and Talaat, Mamdouh
- Subjects
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ACOUSTIC neuroma , *VESTIBULO-ocular reflex , *EVOKED potentials (Electrophysiology) , *VESTIBULAR stimulation , *ACTION potentials - Abstract
Objectives: The aim of this study is to record the VEMP changes that occur in patients with vestibular schwannoma to assess vestibulospinal reflexes. Material and Methods: This study was carried on fifteen patients with vestibular schwannoma. Fifteen persons not suffering from any vestibulo-cochlear problem were subjected to VEMP recordings as controls. Results: In this study, 3 patients (20%) had no VEMP waves on the affected side (but the waves were preserved on the other side), 11 patients (73.4%) had no VEMP waves bilaterally, and 1 patient (6.6%) had VEMP waves preserved on both sides As for the latencies of p1, n1 waves and peak to peak amplitude variation, VEMP could be elicited only in 4 patients (26.8%). There was a significant difference between the patients and controls in regard to mean p1 and n1 latencies but there was no significant difference between the peak amplitudes of patients and controls. Conclusion: VEMP can be a good indicator for the function of the vestibulospinal reflexes than other physiological examinations in cases of vestibular schwannoma. [ABSTRACT FROM AUTHOR]
- Published
- 2010