HNO · 2005
[Vestibular evoked muscle potentials dependency on neural origin and the location of an acoustic neuroma].
Клиническое исследованиеАннотация на английскомСтатьяНазвание и аннотация: Перевод пока не подготовлен
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Hamann C, Rudolf J, von Specht H, Freigang B
Аннотация
INTRODUCTION: Most acoustic neuromas (AN) originate from the inferior vestibular nerve (IVN). Vestibular evoked myogenic potentials (VEMP) are accepted as the only unilateral test for the function of the sacculus and the IVN.
METHODS: The influence of the origin from the IVN and superior vestibular nerve (SVN), and the position of the AN in relation to the internal auditory canal on VEMPs was investigated. A total of 39 patients (aged: 30-67 years, mean: 53 years) were examined. The VEMPs were recorded on the activated sternocleidomastoid muscle and averaged over 200 stimuli. Tone bursts (95 dB nHL; 500 Hz; stimulation rate 5 Hz) were used to generate the VEMPs.
RESULTS: The exact origin of the AN from the SVN or the IVN could be determined intraoperatively and correlated using VEMP in 28 patients.
CONCLUSION: The origin of the AN has only a marginal influence on the results of VEMP measurements. The position of the AN in relation to the internal auditory canal seems to have more influence than the origin.
METHODS: The influence of the origin from the IVN and superior vestibular nerve (SVN), and the position of the AN in relation to the internal auditory canal on VEMPs was investigated. A total of 39 patients (aged: 30-67 years, mean: 53 years) were examined. The VEMPs were recorded on the activated sternocleidomastoid muscle and averaged over 200 stimuli. Tone bursts (95 dB nHL; 500 Hz; stimulation rate 5 Hz) were used to generate the VEMPs.
RESULTS: The exact origin of the AN from the SVN or the IVN could be determined intraoperatively and correlated using VEMP in 28 patients.
CONCLUSION: The origin of the AN has only a marginal influence on the results of VEMP measurements. The position of the AN in relation to the internal auditory canal seems to have more influence than the origin.