Isometric active force and passive load were measured quantitatively in five patients with dysthyroid myopathy during the alert state, to analyze the mechanism of ocular motor disturbance. The results were as follows: (1) the active forces in both agonist and antagonist muscles working in the direction of ocular limitation showed normal values and functioning according to Hering’s laws; (2) increasing the passive load of the antagonist muscles consistently demonstrated a close correlation to ocular motor disturbance, but some other muscles also showed abnormal stiffness without clinical signs, and (3) muscle enlargement identified by coronal computed tomography scan was not necessarily related to increased passive load.

Keywords:
Dysthyroid myopathy, Active force, Passive load, Mechanical properties, Computed tomography
This content is only available via PDF.
© 1994 S. Karger AG, Basel
1994
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.