Archives of otolaryngology--head & neck surgery · 2001
Narrow internal auditory meatus: an idiopathic case confirming the origin and pathway of vestibular evoked myogenic potentials in humans.
Клинический случайСтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
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Ito K, Ishimoto S, Murofushi T
Аннотация
OBJECTIVE: To confirm the origin and pathway of vestibular evoked myogenic potentials (VEMPs) in humans.
DESIGN: Case study.
SETTING: University hospital.
PATIENT: A patient with a narrow internal auditory meatus (IAM).
MAIN OUTCOME MEASURES: Imaging studies and functional studies concerning the seventh and eighth cranial nerves.
RESULTS: Of the 4 nerves in the IAM, all but the cochlear nerve had normal function and normal courses, despite the pronounced narrowing of the IAM. The facial nerve had a normal diameter, but the vestibular nerves were thinner. Imaging revealed that the cochlear nerve was absent or extremely thinned. Both the cochlea and the cochlear nerve showed no function in the affected ear, although the VEMPs were evoked normally.
CONCLUSION: Our results definitively support the vestibular origin of VEMPs in humans.
DESIGN: Case study.
SETTING: University hospital.
PATIENT: A patient with a narrow internal auditory meatus (IAM).
MAIN OUTCOME MEASURES: Imaging studies and functional studies concerning the seventh and eighth cranial nerves.
RESULTS: Of the 4 nerves in the IAM, all but the cochlear nerve had normal function and normal courses, despite the pronounced narrowing of the IAM. The facial nerve had a normal diameter, but the vestibular nerves were thinner. Imaging revealed that the cochlear nerve was absent or extremely thinned. Both the cochlea and the cochlear nerve showed no function in the affected ear, although the VEMPs were evoked normally.
CONCLUSION: Our results definitively support the vestibular origin of VEMPs in humans.