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  1. Medical and Biological Engineering and Computing
  2. Medical and Biological Engineering and Computing : Volume 47
  3. Medical and Biological Engineering and Computing : Volume 47, Issue 5, May 2009
  4. Conjunct rotation: Codman’s paradox revisited
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Medical and Biological Engineering and Computing : Volume 55
Medical and Biological Engineering and Computing : Volume 54
Medical and Biological Engineering and Computing : Volume 53
Medical and Biological Engineering and Computing : Volume 52
Medical and Biological Engineering and Computing : Volume 51
Medical and Biological Engineering and Computing : Volume 50
Medical and Biological Engineering and Computing : Volume 49
Medical and Biological Engineering and Computing : Volume 48
Medical and Biological Engineering and Computing : Volume 47
Medical and Biological Engineering and Computing : Volume 47, Issue 12, December 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 11, November 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 10, October 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 9, September 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 8, August 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 7, July 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 6, June 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 5, May 2009
Shoulder biomechanics: today’s consensus and tomorrow’s perspectives
Detection of the movement of the humerus during daily activity
Inter-operator reliability and prediction bands of a novel protocol to measure the coordinated movements of shoulder-girdle and humerus in clinical settings
Scapular muscle activation and co-activation following a fatigue task
Functional categorization of the individual morphology of the scapula
Effect of rotator cuff dysfunction on the initial mechanical stability of cementless glenoid components
Refixation stability in shoulder hemiarthroplasty in case of four-part proximal humeral fracture
Development of a prosthesis shoulder mechanism for upper limb amputees: application of an original design methodology to optimize functionality and wearability
Combined feedforward and feedback control of a redundant, nonlinear, dynamic musculoskeletal system
Effects of different technical coordinate system definitions on the three dimensional representation of the glenohumeral joint centre
Conjunct rotation: Codman’s paradox revisited
Deltoid muscle volume estimated from ultrasonography: in vitro validation and correlation with isokinetic abduction strength of the shoulder
Arm load magnitude affects selective shoulder muscle activation
Medical and Biological Engineering and Computing : Volume 47, Issue 4, April 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 3, March 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 2, February 2009
Medical and Biological Engineering and Computing : Volume 47, Issue 1, January 2009
Medical and Biological Engineering and Computing : Volume 46
Medical and Biological Engineering and Computing : Volume 45
Medical and Biological Engineering and Computing : Volume 44
Medical and Biological Engineering and Computing : Volume 43
Medical and Biological Engineering and Computing : Volume 42
Medical and Biological Engineering and Computing : Volume 41
Medical and Biological Engineering and Computing : Volume 40
Medical and Biological Engineering and Computing : Volume 39
Medical and Biological Engineering and Computing : Volume 38
Medical and Biological Engineering and Computing : Volume 37
Medical and Biological Engineering and Computing : Volume 36
Medical and Biological Engineering and Computing : Volume 35

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Conjunct rotation: Codman’s paradox revisited

Content Provider SpringerLink
Author Wolf, Sebastian I. Fradet, Laetitia Rettig, Oliver
Copyright Year 2009
Abstract This contribution mathematically formalizes Codman’s idea of conjunct rotation, a term he used in 1934 to describe a paradoxical phenomenon arising from a closed-loop arm movement. Real (axial) rotation is distinguished from conjunct rotation. For characterizing the latter, the idea of reference vector fields is developed to define the neutral axial position of the humerus for any given orientation of its long axis. This concept largely avoids typical coordinate singularities arising from decomposition of 3D joint motion and therefore can be used for postural (axial) assessment of the shoulder joint both clinically and in sports science in almost the complete accessible range of motion. The concept, even though algebraic rather complex, might help to get an easier and more intuitive understanding of axial rotation of the shoulder in complex movements present in daily life and in sports.
Starting Page 551
Ending Page 556
Page Count 6
File Format PDF
ISSN 01400118
Journal Medical and Biological Engineering and Computing
Volume Number 47
Issue Number 5
e-ISSN 17410444
Language English
Publisher Springer-Verlag
Publisher Date 2009-04-25
Publisher Place Berlin, Heidelberg
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Shoulder Joint Modelling Axial rotation Convention Gimbal lock Computer Applications Imaging Radiology Human Physiology Biomedical Engineering
Content Type Text
Resource Type Article
Subject Biomedical Engineering Computer Science Applications
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