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Vestibular Evoked Myogenic Potential

Vestibular Evoked Myogenic Potential
Author: Toshihisa Murofushi
Publisher: Springer Science & Business Media
Total Pages: 112
Release: 2009-03-28
Genre: Medical
ISBN: 443185908X

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The vestibular labyrinth consists of ? ve compartments: the lateral, anterior, and posterior semicircular canals, the utricule, and the saccule. At the beginning of the twentieth century, Robert Bárány proposed the caloric test as a clinical test of the lateral semicircular canal. This test enabled clinicians to assess the individual lateral semicircular canal function easily by using the simple method of irrigating the external ear canal with cold or warm water and observing the induced nyst- mus. We believe that the caloric test was a breakthrough in the ? eld of vestibular research. However, as far as the other compartments were concerned, there was no simple clinical test equal to the caloric test for the lateral semicircular canal function. At the end of the twentieth century, the vestibular evoked myogenic potential (VEMP) test was proposed as a new method for assessing the individual saccule function. This test has some unique attributes. First, it uses sound stimulation, even though it is a test of the vestibular system. This appears to be a contradiction n- rophysiologically. As a result, in its early stages there were controversies conce- ing the origin of the responses. However, such controversies have been overcome by basic neurophysiological studies and clinical studies. Above all, sound sensit- ity of the saccular afferents shown in cats and guinea pigs with single-unit recording methods became the main supporting evidence. Nowadays, VEMP is one of the routine clinical tests for balance disorder.


The Vestibular Evoked Myogenic Potential Profile of Adults Post Vestibular Neurectomy as Compared to Adults with and Without Menière's Disease

The Vestibular Evoked Myogenic Potential Profile of Adults Post Vestibular Neurectomy as Compared to Adults with and Without Menière's Disease
Author: Tamar Mehl Henen
Publisher:
Total Pages: 154
Release: 2016
Genre: Speech therapy
ISBN:

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BACKGROUND: The recent development of the ocular vestibular evoked myogenic potential (oVEMP) test protocol in addition to the cervical vestibular myogenic potential (cVEMP), can provide clinicians information about the functioning of the otolith end organs and their enervating pathways. The utilization of cVEMPs and oVEMPs together may also provide feedback on the success of the surgical attempt to preserve the cochlear fibres during vestibular neurectomy (VN), highlighting the need for including both oVEMPs and cVEMPs in Menière s Disease (MD) subjects post VN. OBJECTIVES: To describe the impact of VN via the retro sigmoid approach on cVEMPs and oVEMPs in subjects with MD. METHODS: This study compared cVEMP and oVEMP responses of 15 subjects with and without MD and 14 subjects with MD who received a VN. The AAO-HNS (1995) classification was used as diagnostic criteria for MD. RESULTS: cVEMP and oVEMP responses were absent on the side of the surgery, in all subjects with MD who had undergone VN. CONCLUSION: Following VN, cVEMPs and oVEMPs were found to be absent.


Neuro-Otology

Neuro-Otology
Author:
Publisher: Elsevier
Total Pages: 428
Release: 2016-09-13
Genre: Medical
ISBN: 0444634479

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Neuro-Otology: a volume in the Handbook of Clinical Neurology series, provides a comprehensive translational reference on the disorders of the peripheral and central vestibular system. The volume is aimed at serving clinical neurologists who wish to know the most current established information related to dizziness and disequilibrium from a clinical, yet scholarly, perspective. This handbook sets the new standard for comprehensive multi-authored textbooks in the field of neuro-otology. The volume is divided into three sections, including basic aspects, diagnostic and therapeutic management, and neuro-otologic disorders. Internationally acclaimed chapter authors represent a broad spectrum of areas of expertise, chosen for their ability to write clearly and concisely with an eye toward a clinical audience. The Basic Aspects section is brief and covers the material in sufficient depth necessary for understanding later translational and clinical material. The Diagnostic and Therapeutic Management section covers all of the essential topics in the evaluation and treatment of patients with dizziness and disequilibrium. The section on Neuro-otologic Disorders is the largest portion of the volume and addresses every major diagnostic category in the field. Synthesizes widely dispersed information on the anatomy and physiology of neuro-otologic conditions into one comprehensive resource Features input from renowned international authors in basic science, otology, and neuroscience Presents the latest assessment of the techniques needed to diagnose and treat patients with dizziness, vertigo, and imbalance Provides the reader with an updated, in-depth review of the clinically relevant science and the clinical approach to those disorders of the peripheral and central vestibular system


Auditory Evoked Potentials

Auditory Evoked Potentials
Author: Robert F. Burkard
Publisher: Lippincott Williams & Wilkins
Total Pages: 156
Release: 2007
Genre: Medical
ISBN: 9780781757560

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Written by experts with extensive clinical and scientific experience, this comprehensive textbook presents the state of the art in auditory evoked potentials. Opening chapters explain the nature of electrical fields that generate surface recorded potentials, summarize the imaging modalities that complement evoked potential studies, and review acoustics and instrumentation. Major sections examine the anatomy and physiology of the auditory periphery, brainstem, and cortex and the principles and clinical applications of auditory, myogenic, visual, somatosensory, and vestibular evoked potentials. Chapters present hands-on laboratory exercises and clinical case studies. A full-color insert includes 3D images from multi-channel evoked potentials and functional imaging.


Normative Data Study on Vestibular Evoked Myogenic Potential

Normative Data Study on Vestibular Evoked Myogenic Potential
Author: Tin Duc Truong
Publisher:
Total Pages: 63
Release: 2015
Genre:
ISBN:

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Vestibular evoked myogenic potential is a specialized test within the vestibular test battery that specifically examines the integrity of the otolithic organs within the inner ear. The way in which the test is executed varies between individual clinics. Therefore, it is important for each individual clinic to establish its own set of normative data that are unique to their chosen recording and stimulus parameters. The goal of this current study is to establish normative data for cervical and ocular vestibular myogenic evoked potential tests at the Towson University Hearing and Balance clinic.


Cochlear Implantation in Children with Inner Ear Malformation and Cochlear Nerve Deficiency

Cochlear Implantation in Children with Inner Ear Malformation and Cochlear Nerve Deficiency
Author: Kimitaka Kaga
Publisher: Springer
Total Pages: 168
Release: 2016-12-05
Genre: Medical
ISBN: 9811014000

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The purpose of this book is to contribute to basic and clinical medical research on cochlear implants for inner ear malformation and cochlear nerve deficiency. Cochlear implantation for children is performed worldwide, and the outcomes concerning speech and hearing acquisition are epoch-making. However, there are some difficulties associated with applying this operative treatment to patients who have complicated inner ear malformations or cochlear nerve deficiencies that have slowed the development of their speech, hearing, and/or sense of balance. The first part of the book outlines the fundamental aspects of inner ear maldevelopment to facilitate readers’ understanding of cochlear implantation from the point of view of embryology, morphology, and genetics. In turn, the second part describes current clinical cases and presents successful clinical reports. The book offers a primary resource for otolaryngologists, neurologists, and pediatricians with an interest in this field.