Journal Mobile Options
Table of Contents
Vol. 166, No. 3, 2000
Issue release date: 2000

Shape, Orientation and Spacing of the Primary Epidermal Laminae in the Hooves of Neonatal and Adult Horses (Equus caballus)

Douglas J.E. · Thomason J.J.
To view the fulltext, log in and/or choose pay-per-view option

Individual Users: Register with Karger Login Information

Please create your User ID & Password





Contact Information











I have read the Karger Terms and Conditions and agree.

To view the fulltext, please log in

To view the pdf, please log in

Abstract

Circumferential and proximodistal variations in the morphology of the primary epidermal laminae of six neonatal and five adult equine feet were documented. Three parameters were quantified: interlaminar spacing, the orientation of the laminae with respect to the overlying wall, and any angulation within the laminae themselves (‘internal angle’). In adult feet, the laminae were most closely spaced at the dorsum, the spacing increasing gradually towards the heels. In foals there was a non-significant trend for the dorsal laminae to be more widely spaced than those in more caudal parts of the foot. In both age groups, the dorsal laminae were almost straight (mean divergence from linearity at all sites 2°), and were oriented at approximately 90° to the tangent to the overlying wall (mean orientation for all sites 91°). At the quarters, the laminae were in general oriented caudally relative to the tangential position from their epidermal to their dermal ends (mean orientation of >90° at 12 of 16 sampling sites, where an orientation of >90° defines a ‘caudally directed’ orientation) and, in general, had a bend within their length (mean absolute value of internal angle for all sites 9°). At the heels there was greater variability in the data for both laminar orientation and internal angle. Overall, the foal feet showed greater mediolateral symmetry and less proximodistal variation than did the adult feet. In both age groups, rapid spatial changes in laminar morphology were closely associated with the position of the margins of the third phalanx.

Copyright © 2000 S. Karger AG, Basel



Copyright / Drug Dosage

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 or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
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 goverment 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.

References

  1. Douglas, J.E., T.L. Biddick, J.J. Thomason, J.C. Jofriet (1998) Stress/strain behaviour of the equine laminar junction. J Exp Biol 201: 2287–2297.

    External Resources

  2. Linford, R.L. (1987) A Radiographic, Morphometric, Histological and Ultrastructural Investigation of Lamellar Function, Abnormality and the Associated Radiographic Findings for Sound and Footsore Thoroughbreds, and Horses with Experimentally Induced Traumatic and Alimentary Laminitis; PhD thesis, University of California, Davis.
  3. Lochner, F.K., D.W. Milne, E.J. Mills, J.J. Groom (1980) In vivo and in vitro measurement of tendon strain in the horse. Am J Vet Res 41: 1929–1937.

    External Resources

  4. Lungwitz A. (1981) The changes in the form of the horse’s hoof under the action of the body-weight. J Comp Pathol Ther 4/3: 191–211.
  5. Pollitt, C.C. (1994) The basement membrane at the equine hoof dermal epidermal junction. Equine Vet J 26: 399–407.
  6. Riemersma, D.J., A.J. van den Bogert, M.O. Jansen, H.C. Schamhardt (1996a) Tendon strain in the forelimbs as a function of gait and ground characteristics and in vitro limb loading in ponies. Equine Vet J 28/2: 133–138.
  7. Riemersma, D.J., A.J. van den Bogert, M.O. Jansen, H.C. Schamhardt (1996b) Influence of shoeing on ground reaction forces and tendon strains in the forelimbs of ponies. Equine Vet J 28/2: 126–132.
  8. Thomason, J.J., A.A. Biewener, J.E.A. Bertram (1992) Surface strain on the equine hoof wall in vivo: Implications for the material design and functional morphology of the wall. J Exp Biol 166: 145–168.


Pay-per-View Options
Direct payment This item at the regular price: USD 38.00
Payment from account With a Karger Pay-per-View account (down payment USD 150) you profit from a special rate for this and other single items.
This item at the discounted price: USD 26.50