Download or read book Vestibular Evoked Myogenic Potentials The Influence of Head Position for Click and Toneburst Stimuli written by Rebecca J. Price and published by . This book was released on 2007 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the Vestibular Evoked Myogenic Potential (VEMP) was discovered nearly fifty years ago, clinical interest in the vestibular evoked potential has only recently resurfaced. Since the VEMP is a relaxation potential, it is important to investigate stimulus and parameter characteristics in order to minimize variability among the recordings and maximize clinical benefit. The present study aims to determine what effect head position, bandwidth, and ear stimulated have on the VEMP recordings. The present study will also correlate the relationship between test and re-test reliability for VEMP amplitude and latency measures. Twenty normal hearing (defined as ≤ 15 dB HL for frequencies 250-8000 Hz) females with no current or previous history of otologic and/or vestibular dysfunction were enrolled in the study. Participants underwent serial VEMP testing utilizing four different head positions: Head Rotation, Head Rotation with Forward Tilt, Head Rotation with Backward Tilt, and Head on Chin. A 95 dB nHL 100 musec click and 500 Hz toneburst stimuli were utilized to elicit a VEMP for each head position. For each test condition, a VEMP response was recorded twice. Intensity was decreased in 10 dB steps until threshold was reached. Threshold was defined as the lowest intensity level where a VEMP recording was repeated. Both the right and left ears were stimulated monaurally for all participants. Condition order was randomized for head position, bandwidth, and ear to counterbalance order effect. For all VEMP recordings, absolute amplitude and latency measures for P1, N1, and P2 recorded. Absolute threshold was also documented. Interaural threshold measures were also calculated for analysis. Results demonstrated high test re-test reliability between VEMP recordings. There was no significant ear effect for amplitude or latency measures. A significant bandwidth effect was found with the 500 Hz toneburst stimuli producing larger amplitude and unanticipated longer latencies than the 100 musec click stimuli for P1, N1, and P2 measurements. Lower absolute thresholds were also noted when utilizing the 500 Hz toneburst stimulus. Head position was also shown to have a significant effect on VEMP recording, with the Head Rotation and Head on Chin conditions producing larger amplitudes for P1, N1, and P2 than the other two head positions. P1 latency did not demonstrate a significant head position effect. However, slightly longer N1 latencies were found for the Head Rotation and Head on Chin conditions. Slightly longer P2 latencies were documented for the Head Rotation with Forward Tilt and Backward Tilt, respectively. The Head Rotation and Head on Chin conditions produced lower thresholds than the remaining two conditions.

Download or read book Vestibular Evoked Myogenic Potential written by Toshihisa Murofushi and published by Springer Science & Business Media. This book was released on 2009-03-28 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Rehabilitation R D written by and published by . This book was released on 2004 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Commonalities and Differences in Vestibular and Auditory Pathways written by Soroush G. Sadeghi and published by Frontiers Media SA. This book was released on 2022-04-19 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neurologic Differential Diagnosis written by Alan B. Ettinger and published by Cambridge University Press. This book was released on 2014-04-17 with total page 693 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing pressure upon clinicians to see more and more patients generates great concern as to how to offer a comprehensive and thorough diagnostic approach and yet maintain efficiency. Neurologic Differential Diagnosis is the answer. Unlike other texts which are divided into disease entities, this book uses a case study approach to focus on the patients' symptoms. Each chapter is dedicated to a specific presenting symptom or sign and includes a comprehensive, yet succinct table of clinical features to aid clarification of the broad list of diagnostic possibilities. This allows the clinician to quickly reference specific symptoms such as dizziness, mental status change or diplopia; or signs such as foot drop or psychotic behavior, and then immediately generate diagnostic possibilities. Written from the authors' extensive clinical experience, Neurologic Differential Diagnosis is an invaluable text for neurologists and psychiatrists at all stages of training.

Download or read book Vestibulospinal Control of Posture and Locomotion written by and published by Elsevier. This book was released on 1988-10-01 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume publishes the review articles presented by the invited speakers at the Satellite Meeting to the Barany Society Meeting held in Bologna, Italy during June 1987. The subject matter in this book is divided into seven main sections. The first three present basic neuroanatomical and neurophysiological aspects of vestibulospinal reflexes and document the neck afferent and visual influences on these reflexes. The following sections deal with the control of locomotion, posture, and eye-head-trunk coordination by vestibulospinal signals. The final section provides current knowledge on the processes underlying compensation of vestibulospinal deficits. An overall review precedes each main section so that the reader is informed as to which questions are still controversial and require further investigation. In this way a basis is provided for those needing a current account of the field of vestibulospinal reflexes. Due to the extensive length of the contents, only the number of articles presented per session is listed below.

Download or read book Ballenger s Otorhinolaryngology written by John Jacob Ballenger and published by PMPH-USA. This book was released on 2003 with total page 1245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive compendium of current knowledge in the fields of otology/neurotology, rhinology, facial plastic and reconstructive surgery, paediatric otorhinolaryngology, head and neck surgery and bronchoesophagology features sections on facial plastic, reconstructive surgery and paediatrics. The content reflects the central responsibility of the otorhinolaryngologist in treating patients with diseases affecting the senses of smell, taste and balance. Also encompassed in this section are treatments for disorders of human communication affecting hearing, voice, speech and language.

Download or read book Dizziness and Vertigo written by Rahul Kanegaonkar and published by CRC Press. This book was released on 2014-05-22 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highly Commended, BMA Medical Book Awards 2015Vertigo and Dizziness: An Introduction and Practical Guide describes the basic knowledge and practical skills necessary for managing patients presenting with the common symptoms of dizziness and vertigo. It provides practitioners with a comprehensive overview of these conditions, steps for diagnosing pa

Download or read book Neurologic Differential Diagnosis written by Alan B. Ettinger and published by Cambridge University Press. This book was released on 2014-04-17 with total page 693 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unique case-based guide to generating diagnostic possibilities based on the patients' symptoms. Invaluable for psychiatrists and neurologists.

Download or read book Insights in neuro otology 2021 and 2022 written by Michael Strupp and published by Frontiers Media SA. This book was released on 2023-04-10 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Clinical Neurophysiology of the Vestibular System written by Robert William Baloh and published by Oxford University Press, USA. This book was released on 1990 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this well-received text is at least 50% larger than its predecessor, with most of the additional pages devoted to clinical diagnosis and treatment of a wide range of common neuro-otologic disorders. Algorithms and tables guide the practitioner confronted with a patient complaining of dizziness or related symptoms. Newer tests are discussed, and the chapter on the evaluation of hearing has been significantly expanded. The highly praised sections on basic neurophysiology reflect the latest research. This edition features 87 new illustrations including tables, diagnostic charts, and MRI and CT scans.

Download or read book Neuro Otology written by and published by Elsevier. This book was released on 2016-09-13 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book Handbook of Balance Function Testing written by Gary P. Jacobson and published by Singular. This book was released on 1997 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introductory reference on balance function testing for clinicians and technicians who assess patients with balance system disorders. Part I provides a historical framework for understanding the evolution of balance function testing. Part II begins with an overview of the anatomy and physiology of the vestibular system and principles of electro-oculography, then focuses on subtests comprising the ENG test battery. Parts III and IV describe rotational and CDP test techniques, and Part V addresses special issues such as medical and surgical treatment and assessment. Includes bandw diagrams. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Up to Date on Meniere s Disease written by Fayez Bahmad and published by BoD – Books on Demand. This book was released on 2017-10-04 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dizziness and vertigo are symptoms related to peripheral vestibular disorders. These are among the most common complaints in medical offices, and knowledge of the major diseases affecting this system is of fundamental importance to the specialist in otolaryngology. In recent years, great advances have been made in otoneurology, which, coupled with increasing knowledge in the field of neurosciences, have substantially modified the approach of the patient with balance complaints. This book studies the most polemic of these vestibular diseases, the Meniere's disease.

Download or read book Evoked Potential Manual written by E. Colon and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evoked potentials are potentials that are derived from the peripheral or central nervous system. They are time locked with an external stimulus and can be influenced by subjective intentions. Evoked potentials have become increasingly popular for clinical diagnosis over the last few years. Evoked potentials from the visual system are used by ophthalmologists in order to localize the abnormalities in the visual pathway. The otologists are mainly involved in brainstem auditory evoked potentials, while the pediatricians, neonatologists, neurologists and clinical neurophysiologists make use of multimodal stimulation. The psychiatrists and psychologists, generally, examine the slow potentials such as P300 and CNV. Anesthesiologists use short latency somatosensory and visual evoked potentials in order to monitor the effectiveness of the anesthesia. Pharmaco evoked potentials are very promising measures for the quan tification of the effectiveness of drug action on the cerebral cortex. Urologists are more and more involved in pudendal somatosensory evoked potentials and in the intensive care unit evoked potentials are used in order to monitor the functional state of the central nervous system of the patient. This overwhelming number of examinations and exam ina tors clearly demonstrates the need for guidelines and standardization of the methods used. The evoked potential metholody is restricted by the relative poor signal to noise ratio. In many diseases this signal to noise ratio decrease rapidly during the progression of the illness. Optimal technical equipment and methodology are therefore essential.

Download or read book Average Evoked Potentials written by Emanuel Donchin and published by . This book was released on 1969 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods, results, and evaluation of research in average evoked potentials.