On the hypotheses that determine the definitions of glenohumeral joint motion: with resolution of Codman’s pivotal paradox JSES
In this article the authors provide a highly mathematical method for describing shoulder motion.
In a previous post we have pointed to the value of global diagrams for accomplishing the same goal.
With respect to Codman's paradox (and the similar paradox of Rowe), the diagrams below from our book, Practical Evaluation and Management of the Shoulder (available free here) make it easy for us to understand. In order to determine the acquired rotation of the humerus, all we need to know is the fraction of the globe circumscribed by the motion of the arm.
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You may be interested in some of our most visited web pages including:shoulder arthritis, total shoulder, ream and run, reverse total shoulder, CTA arthroplasty, and rotator cuff surgery.
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If you have suggestions for topics you'd like us to address in this blog, please send an email to
shoulderarthritis@uw.edu
Use the "Topics" box to the right to find other posts of interest to you.
You may be interested in some of our most visited web pages including:shoulder arthritis, total shoulder, ream and run, reverse total shoulder, CTA arthroplasty, and rotator cuff surgery.
See the countries from which our readers come on this post.
