Electronystagmography/Videonystagmography: (ENG/VNG)

This book provides a concise guide to conducting and interpreting the electronystamography/ videonystagmography examination. In order to provide a foundation for understanding ENG/VNG test results, the early sections of the text are dedicated to a description of normal and impaired peripheral and central vestibular system function. Also addressed is the process of central nervous system compensation. These sections are followed by a description and interpretation of the ENG/VNG subtests including: ocular motor testing, positional/ing testing and caloric testing. Finally, examples of counseling materials and illustrative case studies that serve to highlight the principles and techniques covered in the manual will be provided. This text is designed to be a practical and portable resource for use in the clinic. It may serves as a text for students training or as a practical summary of existing larger textbooks.

Table of Contents:
Preface Acknowledgments 1 Neural Control of Eye Movements Introduction Hierarchy of the Oculomotor System The "Final Common Pathway" of the Oculomotor System Premotor System Saccade System Pursuit System Gaze-Holding: The "Neural Integrator" Optokinetic System 2 Anatomy and Physiology of the Vestibular System Introduction Vestibular Hair Cells Semicircular Canal Anatomy and Physiology Otolith Organ Anatomy and Physiology Primary Vestibular Afferent Projections Anatomy of the Central Vestibular System Vestibular Nystagmus The VOR During Sustained Movement 3 Peripheral Vestibular Impairment and Central Nervous System Compensation Introduction Effect of Unilateral Vestibular Lesions Neural Basis of Vestibular Compensation Laws of Compensation Caloric Stimulation of the Vestibular System 4 Pretest Procedures for VNG Introduction Case History Assessment of Dizziness Handicap Chronic Subjective Dizziness Gross Eye Movement Examination Otoscopic Examination The VNG Environment 5 Eye Movement Examination Introduction Instrumentation EOG/ENG: Corneoretinal Potential Using the CRP to Record Eye Movements Saccade Test Gaze Test Smooth Pursuit Tracking Test Optokinetic Test 6 Positional and Positioning Testing Static Positional Testing Positioning Testing Treatment of Benign Paroxysmal Positioning Vertigo 7 The Caloric Test Introduction Components of the Caloric Test Instrumentation Preparation for the Caloric Test Caloric Test Technique Analysis of Caloric Responses Interpretation of Caloric Responses Technical Tips for Caloric Testing Appendix A. Dizziness Questionnaire Appendix B. A Patient's Guide to Benign Paroxysmal Positional Vertigo (BPPV) Appendix C. Vanderbilt Balance Disorders Laboratory Patient Brochure Appendix D. Your Balance in 4 Pages Counseling Material Appendix E. Example Alerting Tasks for Vestibular Testing Appendix F. Reliability and Localizing Value of VNG Findings References Index

About the Author :
Devin Lochlan McCaslin, PhD Devin Lochlan McCaslin, Ph.D., Vanderbilt Bill Wilkerson Center, Dvision of Audiology, Balance Disorders Clinic, Nashville, Tennessee.

Review :
John E FitzGerald BSc PhD CS, Consultant Clinical Scientist, Head of Audiological Services, Norfolk & Norwich University Hospitals, UK, ENT & Audiology News, Vol. 23 No. 5, (November/December 2014): "This book provides a good reference for anyone starting out in the field of balance assessment, and would be a useful book in any balance assessment clinic as a source of information from anatomy to test interpretation. ---------------------------------------------------------------------------------- Anatomy and physiology are presented clearly in a way that relates to testing performed in the clinic. Clearly labeled diagrams step through the physiological responses from a basic level. Peripheral vestibular impairment and the processes of central nervous system compensation are described thoroughly with clear diagrams to explain the processes... ----------------------------------------------------------------------------------- A section on history taking will help the balance student structure and work through a history to develop an impression of the patient's condition. There is a chapter dedicated to describing ENG and VNG and eye movement examinations with a description of the pathologies indicated, with a few trace examples to show abnormal results. --------------------------------------------------------------------------------- BPPV in all its various forms is well described with details on the anatomy physiology testing and treatment being covered and well referenced... ---------------------------------------------------------------------------------- There are six appendices which include a selection of useful questionnaires and information leaflets for patients. - [O]verall this is an ideal book for those wanting to learn about vestibular testing or to develop their knowledge through the reference section."