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O Okunribido
05-26-1998, 08:34 PM
Many thanks to all who replied my recent enquiry. I feel more
confident now with the leads and information that have been provided.

Below are the question and request posed and the replies I received.
Thanks once again.
Olanrewaju O OKUNRIBIDO


THE QUESTION AND REQUEST
Please advice on how electrogoniometers and opto-electronic 3-D
systems like CODA may best be used to measure forearm internal and
external rotation. I will be glad to receive, information and
references on case applications and other methods for taking the
measurements in a practical, actual task performance situation.
__________________________________________________ __________
RESPONSES RECEIVED
Date sent: Fri, 08 May 1998 13:33:42 -0700 (Pacific
Daylight Time)

I just attended a course which the VICON people put together to help
in designing models for their software and Julian Morris had a very
good idea to solve this problem. They had a model of lifting where
the subject had a wand placed across the forearm at the wrist which
acted to place two markers away from the arm so that they could be
seen by the cameras. No big surprise here but he did suggest that the
model incorporate a "virtual joint" set in the forearm which would
allow only rotation in the transverse plane (a cylinder joint). This
way all flexion/extension occurs at the elbow and all rotation
(pronation/supination) occurs at this virtual joint in the forearm.
Apparently the animation industry has been doing this for some time.
Take a look and a child's movable doll and sometimes you will see
this joint included in the forearm to give the doll "normal" motion.
Good luck

Michael Orendurff, MS
Clinical Biomechanist
Gait Analysis Laboratory
Portland Shriners Hospital
MSO@shcc.org
__________________________________________________ ___________________
Date sent: Mon, 11 May 1998 10:31:58 +0100 I forgot to mention
the thesis of Guus van der Vaart: Arm movements in operating rotary
controls, series on physical ergonomics 4, Delft University Press,
1995 (ISBN 90-407-1131-3). This contains information on pronation and
supination of the forearm.

Liek.A.I.M. Voorbij (MSc)
TU Delft
Faculty of Industrial Design Engineering
Section Physical Ergonomics
Jaffalaan 9
2628 BX DELFT
Phone +31(15)2785196
Fax: +31(15)2787179
__________________________________________________ ___________________
Date sent: Fri, 8 May 1998 15:25:45 -0400 (EDT)

Take a look at

Sreesha S. Rao, et al.'Three-dimensional kinematics of wheelchair
propulsion', IEEE. Trans. on Rehabil. Eng.,vol 4,no 3, 152-160, 1996.

They use VICON system to estimate the upper-arm rotation.
Rachid Aissaoui, Ph.D.
NSERC Industrial Chair on Seating Aids and Wheeled mobility
Dept. Mech. Eng.
Ecole Polytechnique de Montreal.
__________________________________________________ ___________________
Date sent: Mon, 11 May 1998 11:21:40 +0200

Dear Olanrewaju O OKUNRIBIDO,
A few years ago we had a PhD- student who studied also the forearm
rotation and measured data with the Optotrak system.
-------------------------------------------- Arm movement in operating
rotary controls A.J.M. van der Vaart 1995
---------------------------------------- It can be ordered at The
Delft University Press (+fax 31-2781661) or perhaps also for a loan at
university libraries. More info you can find on.
http://www.io.tudelft.nl/research/ergonomics/proefsite/a_physic.html#F
iveKey with kind regards Johan Molenbroek

Johan Molenbroek, PhD
Associate Professor Engineering Anthropometry
Acting Chair Subdepartment Physical Ergonomics
Faculty Design Engineering and Production Delft
University of Technology Jaffalaan 9
2628 BX Delft The Netherlands tel +31 15 278 3086 fax +31 15 278
7179/7316 e-mail j.f.m.molenbroek@io.tudelft.nl
http://www.io.tudelft.nl/research/ergonomics
http://www.dsdelft.nl/~papaver/
__________________________________________________ ___________________
Date sent: Wed, 13 May 1998 04:42:51 -0400

I noticed your e.mail on the BIOMCH Bulletin Board and thought our
product information may be of assistance to you. Our company
(previously known as Penny & Giles Biometrics Ltd.) manufacture the
electrogoniometers you mentioned in your mail. Our torsiometers (Part
Nos. Z110 and Z180) measure forearm rotation and may be suitable for
your project.

I will forward you our current Information Pack and a set of Research
Papers which I happen to have available, and hope this will be useful
for you. If you have any questions about the products or their
applications, please let us know and we will be happy to discuss this
with you.

Kind regards
Mary Wilding
Sales Office Manager
Biometrics Ltd
Tel: 01495 200800
Fax: 01495 200806
Date: 13 May 1998
__________________________________________________ ___________________

OKUNRIBIDO, O Olanrewaju (Mr)
Institute for Occupational Ergonomics
Department of Manufacturing Engineering and Operations Management
University of Nottingham
University Park, NG7 2RD
UK
e-mail: epxooo@EPN2.MANENG.NOTTINGHAM.AC.Uk
Tel: 44-0115-9514036

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