The horizontal optokinetic nystagmus (NOC) has been studied during 5,000 otoneurological investigations. In 16.25 % of all our cases, the NOC was found to be either weakened in both directions, or only in one direction. There has been no constant relationship between intensity of the spontaneous nystagmus and NOC asymmetry in case of peripheral vestibular lesion. NOC asymmetry seems to be a reliable sign of the evolution of a lesion. Cases without peripheral hypo function have been divided into three groups: ocular disturbances, brain stem lesions and hemispherical lesions. In these cases the value of the localization of the asymmetry in NOC and nystagmus induced by vestibular tests has been studied. In hemispherical lesions, when asymmetry affected exclusively the NOC, the direction of the weakened NOC was always towards the healthy side. When asymmetry affected not only NOC but even nystagmus induced by vestibular stimulations, this weakened side of the nystagmus was less significant.

This content is only available via PDF.
Copyright / Drug Dosage / Disclaimer
Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.
You do not currently have access to this content.