 |
|
Vestibular Evoked Myogenic Potentials in Patients With Acoustic Neuromas
Toshihisa Murofushi, MD;
Masaki Matsuzaki, MD;
Masahiro Mizuno, MD
Arch Otolaryngol Head Neck Surg. 1998;124:509-512.
Background To diagnose acoustic neuromas (ANs), the auditory brainstem response test and the caloric test have been used in addition to magnetic resonance imaging. The auditory brainstem response and the caloric tests mainly reflect functions of the auditory pathway, ie, the cochlear nerve and the superior vestibular nerve, respectively. Because the vestibular evoked myogenic potential (VEMP) has been thought to originate in the inferior vestibular nerve, we hypothesized that the VEMP could provide different information from the auditory brainstem response and the caloric test and that it could be helpful in diagnosing ANs. In other words, we hypothesized that the VEMP could provide information concerning inferior vestibular nerve involvement in patients with ANs.
Objective To find out if the VEMP could be useful in classifying ANs according to the involved nerves.
Design We reviewed preoperative clinical tests, including VEMPs, in 21 patients (8 men, 13 women) with ANs confirmed surgically and histopathologically, comparing them with VEMPs in 8 normal subjects (5 men, 3 women).
Results Whereas the first positive-negative peak of the VEMP, P13-N23, was ipsilaterally present on stimulation of the unaffected side in all patients with ANs and both sides in all normal subjects, it was absent on the affected side in 15 patients (71%) and significantly decreased in amplitude in 2 patients (9%). Thus, 17 (80%) of the 21 patients showed abnormal VEMPs. Three patients had abnormal VEMPs although they had normal caloric responses. Three patients had abnormal caloric responses although they had normal VEMPs.
Conclusion These results suggest that the VEMP could be useful for the diagnosis of AN, especially for classifying ANs according to the involved nerves.
From the Departments of Otolaryngology, University of Tokyo (Dr Murofushi), Tokyo Metropolitan Bokuto Hospital (Dr Matsuzaki), and Tokyo University Branch Hospital (Dr Mizuno), Tokyo, Japan.
 CiteULike  Connotea  Del.icio.us  Digg  Reddit  Technorati
What's this?
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES
|
Preservation of Vestibular Evoked Myogenic Potentials With Modified Translabyrinthine Approach
Magliulo et al.
Arch Otolaryngol Head Neck Surg 2007;133:720-723.
FULL TEXT
Vestibular click-evoked myogenic potentials: sensitivity and factors determining abnormality in patients with multiple sclerosis
Patko et al.
Mult Scler 2007;13:193-198.
ABSTRACT
Extent of Lesions in Idiopathic Sudden Hearing Loss With Vertigo: Study Using Click and Galvanic Vestibular Evoked Myogenic Potentials
Iwasaki et al.
Arch Otolaryngol Head Neck Surg 2005;131:857-862.
ABSTRACT
| FULL TEXT
Characteristics and clinical applications of vestibular-evoked myogenic potentials
Welgampola and Colebatch
Neurology 2005;64:1682-1688.
ABSTRACT
| FULL TEXT
A Sound-Evoked Vestibulomasseteric Reflex in Healthy Humans
Deriu et al.
J. Neurophysiol. 2005;93:2739-2751.
ABSTRACT
| FULL TEXT
Diagnostic Value of Prolonged Latencies in the Vestibular Evoked Myogenic Potential
Murofushi et al.
Arch Otolaryngol Head Neck Surg 2001;127:1069-1072.
ABSTRACT
| FULL TEXT
Narrow Internal Auditory Meatus: An Idiopathic Case Confirming the Origin and Pathway of Vestibular Evoked Myogenic Potentials in Humans
Ito et al.
Arch Otolaryngol Head Neck Surg 2001;127:275-278.
ABSTRACT
| FULL TEXT
Short Tone Burst-Evoked Myogenic Potentials on the Sternocleidomastoid Muscle: Are These Potentials Also of Vestibular Origin?
Murofushi et al.
Arch Otolaryngol Head Neck Surg 1999;125:660-664.
ABSTRACT
| FULL TEXT
|
