Vestibular Evoked Myogenic Potential

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 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.

This text reviews the current understanding of vestibular anatomy allowing for a framework of reference, and how it's applied to vestibular testing, diagnosis and management of dizziness. Vestibular testing is an important tool in the evaluation and management of the patient with dizziness. It aids in establishing a diagnosis and determining the side or site of the lesion. In addition, it guides practitioners in selection of treatment and allows the ability of the patient’s condition to be evaluated over its time course. Common vestibular pathologies such as benign positional vertigo, Meniere’s disease, multisensory imbalance, vestibular neuritis, superior canal dehiscence, and vestibular migraine will be addressed in a concise and understandable manner. The text follows a clear format in which the etiology, pathophysiology, diagnostic features and medical or surgical management of such pathologies are discussed. The book gains increased importance as superior canal dehiscence and vestibular migraine are relatively new hot topics. Lastly, relatively rare entities such as bilateral vestibular hypofunction, pediatric vestibular disorders and central vestibular disorders are discussed. This text serves as a complete reference for clinicians, students and researchers interested in this common and severe disorder allowing for improved patient care and advancement of knowledge in the field. Chapters are written by acknowledged experts, allowing summary review of the newest and most up-to-date understanding of scientific information. Diagnosis and Treatment of Vestibular Disorders will be an invaluable resource for otolaryngologists, neurologists, otologists and neurotologists, basic science and translational researchers with interests in the vestibular system, fellows and residents in aforementioned fields, and general practitioners with an interest in patients with symptoms of dizziness.

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.

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

Vestibular-evoked myogenic potentials(VEMPs) are essential in assessing the otolith function in individuals with various vestibular disorders. There are three types of vestibular evoked myogenic potentials: cervical vestibular evoked myogenic potentials, ocular vestibular evoked myogenic potentials, and masseter vestibular evoked myogenic potentials are recorded in various clinical settings. The book Fundamentals of Vestibular Evoked Myogenic Potentials covers all the information related to all three types of VEMPs. The book has eighteen chapters containing information on recording, factors affecting and applications of VEMPs in various vestibular pathologies such as Meniere's disease, Labyrinthitis, BPPV, NIHL, vestibular neuritis, third window syndrome, congenital sensorineural hearing loss, ototoxicity, vestibular Schwannoma and diseases of the central nervous system.

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.