Kinematic Analysis of Human Movement E-Book

Laurence Cheze

• Herausgeber: John Wiley & Sons
• Kategorie: Wissenschaft und neue Technologien
• Sprache: Englisch

Seitenzahl: 143

Veröffentlichungsjahr: 2014

Beschreibung

After a quick survey of the famous pioneers of human movement analysis and the actual needs in different domains, this book presents the main types of systems available on the market (with the pros and cons), and then details the most widely used: the optoelectronic systems using passive markers. The theoretical background for joint kinematics calculation is explained, specifying the international standardization for parameters reports. One chapter is dedicated to measurement errors and their management, followed by several applications, mostly in the clinical field.

Leseprobe

Contents

Foreword

1 Introduction and State of the Art

1.1. Historical benchmarks

1.2. Current needs in different domains

2 The Different Movement Analysis Devices Available on the Market

2.1. Which tools for different applications?

2.2. Optical capture systems and passive tags

3 From Measurement to Interpretation

3.1. The different parameters

3.2. Recommendations by the International Society of Biomechanics to standardize the presentation of joint angles

3.3. Joint translations or displacements

4 Errors in Measurement

4.1. Instrumental errors

4.2. Experimental errors

4.3. Error in locating anatomical landmarks

5 Some Clinical Applications

5.1. Evolution of biomechanical parameters of gait in infants, from first steps to 7 years old

5.2. Upper limb, assessment of functional movements

5.3. Mobility of a healthy cervical spine

5.4. Changes in the three-dimensional kinematics of the knee with medial compartment arthrosis

Conclusion and Future Perspectives

Bibliography

Index

First published 2014 in Great Britain and the United States by ISTE Ltd and John Wiley & Sons, Inc.

Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the Copyright, Designs and Patents Act 1988, this publication may only be reproduced, stored or transmitted, in any form or by any means, with the prior permission in writing of the publishers, or in the case of reprographic reproduction in accordance with the terms and licenses issued by the CLA. Enquiries concerning reproduction outside these terms should be sent to the publishers at the undermentioned address:

ISTE Ltd27-37 St George’s RoadLondon SW19 4EUUK

John Wiley & Sons, Inc.111 River StreetHoboken, NJ 07030USA

www.iste.co.uk

www.wiley.com

© ISTE Ltd 2014

The rights of Laurence Chèze to be identified as the author of this work have been asserted by him in accordance with the Copyright, Designs and Patents Act 1988.

Library of Congress Control Number: 2014953031

British Library Cataloguing-in-Publication Data

A CIP record for this book is available from the British Library

ISSN 2051-2481 (Print)

ISSN 2051-249X (Online)

ISBN 978-1-84821-610-5

Foreword

Starting from the reflex movements of a fetus inside the womb and proceeding toward more complex movements after birth, the central nervous system develops to the point that the cortex imparts a command and the child stands on his/her feet and faces the great challenge of upright locomotion. Maturation and learning lead the child to take hold of his/her motility completely, both at a physical and a cognitive level. Very soon, the association between the ability to move and the very concept of life will come through. It is Gassendi’s “ambulo ergo sum” (I walk therefore I am) in noble alliance with Descartes’ “cogito ergo sum” (I think therefore I am).

Then the child, as well as the pups of all animal species, learns that movement is also survival. The human animal, however, besides using movement to procure food and escape a threat, uses it to manifest intellectual values, such as exploration of his/her physical limits, esthetics, creativity, communication and self-expression.

Movement may be looked upon as a metalanguage that reaches its sublimation in the acting and dancing performance, also being part of the everyday theater. Paradigmatic in this respect is the “biomechanical actor” as conceived by Vsevolod E. Mejerchol’d (1874–1940) and is well summarized in this statement of the Russian intellectual: “it is when the actor has found the correct position that he can pronounce the words, and only then these will sound correct…”.

Movement is health. This paradigm is even quoted in the Encyclopédie by Diderot and D’Alembert: “Mouvement:… se dit de l’action du corps, ou de l’exercice qui est nécessaire pour la conservation de la santé” (… is the action of a living body which is necessary to maintain health). However, the relevant hazard is also pointed out: “dont le défaut comme l’excès lui sont extrêmement préjudiciable” (the lack of movement and the excess of it are extremely prejudicial to the body). Sports, physical exercise, performing arts and manual labor are contexts where this hazard may typically manifest itself. Frailty associated with age magnifies relevant risks.

Motor ability strongly correlates with independent living and quality of life, and its limitation imposes a huge burden on health and social systems. The lengthening of life expectancy is forcing governments to lengthen the duration of active labor and find solutions for prolonged independent living after retirement. Therefore, any intervention aimed at enhancing or maintaining mobility or recovering from motor disability is considered strategically important in present day society.

We do not need to be as visionary as those individuals who want to see robot athletes competing against each other at the 2020 Olympics to appreciate the fact that these machines, whether anthropomorphic or not, are an extremely important reality. Many of their functions are “bio-inspired”, that is they are designed using principles learned from biological locomotor systems. It is also true that techniques developed in robotic engineering have shown themselves to be extremely effective in the analysis of biomovements. Cooperative synergy between robotics and biomechanics is a very productive endeavor.

Irrespective of the scientific or professional goal, the understanding of a process must start from the observation of the phenomenon. The quantitative observation of “how man moves” is referred to as human movement analysis. Today, we would say that we aim at recreating the moving human body in virtual space, the space governed by numbers. In this way, information is gathered, through measurement and using mathematical models of the anatomy and physiology of the organs and systems involved, which not only aids in understanding the mechanisms through which a motor activity is executed, but also allows us to describe the functions of the locomotor subsystems and the adaptive changes that may occur due to systematic training, as a consequence of trauma or illness, or following medical, rehabilitation or surgical treatment. Since the final aim of movement analysis follows a scientific or an evidence-based professional approach, precision, accuracy and cost-effectiveness are issues of great importance.

Those which I have mentioned represent valuable motivations to invest intellectual and financial resources in trying to investigate the intimate nature of human movement. There is also a great demand for standardized experimental and analytical methods that would make possible the valid quantitative description of population-specific or subject-specific motor function aimed at answering both scientific and professional questions. The latter actions must be accompanied by an educational effort in favor of the users, be they scientists, professionals, paramedics or technical personnel, as an indispensible condition for advanced scientific research, for translation of both knowledge and techniques into manufacturers and service providers, and for market development.

I hope this book will provide the readers with the basic tools that are necessary to go down the path that explores the fascinating realm of biomovement that I have briefly described above, and will offer a great opportunity to become active in it. This book contains the meditated and deeply elaborated experience of Professor Laurence Chèze, an outstanding member of the international biomechanics community. I wish all the readers to extract the most out of this book and look forward to having them as members of our community.

Aurelio CAPPOZZO

Director of the Interuniversity Centre of Bioengineering ofthe Human Neuromusculoskeletal SystemDepartment ofMovement, Human and Health Sciences University of Rome“Foro Italico” (Italy)October 2014

1

Introduction and State of the Art

The understanding of human motion has, for a long time, involved researchers from various scientific disciplines: biomechanics, functional anatomy, physiology and neuroscience, etc. Although these different areas of concern are important in order to completely understand human motion, it is not realistic to try to cover all these aspects at the same time. This book deliberately tries to focus on the kinematic aspects, that is to say the quantified description of the human body movement, without looking into understanding the causes or its controlling factors.