Name
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. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1007/s11517-009-0484-6 | Med. Biol. Engineering and Computing |
Keywords | Field | DocType |
range of motion,vector field | Computer vision,Long axis,Shoulder joint,Algebraic number,Reference vector,Gimbal lock,Artificial intelligence,Gravitational singularity,Geometry,Classical mechanics,Mathematics | Journal |
Volume | Issue | ISSN |
47 | 5 | 1741-0444 |
Citations | PageRank | References |
2 | 0.42 | 0 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Sebastian I. Wolf | 1 | 6 | 2.34 |
| Laetitia Fradet | 2 | 49 | 5.02 |
| Oliver Rettig | 3 | 2 | 0.42 |