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Forces at the Glenohumeral Joint in Abduction
Abstract
The purpose of this study was to determine the forces in the glenohumeral joint for isometric abduction (including all directions of rotation) in the plane of the scapula. The lines of actions of muscles were obtained from 3 upper quarter specimens, electromyographic data was used, as well as geometrical parameters of shoulder motion. The main assumption made in the analysis was that the force in a muscle was proportional to its area times the integrated electromyographic signal. The resultant force reached a maximum of 0.89 times body weight at 90 degrees of abduction, while the shearing component up the face of the glenoid was a maximum of 0.42 times body weight at 60 degrees of abduction.
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Citations
Cited by
Glenohumeral muscle force and moment mechanics in a position of shoulder instability
Bassett, R. W., Browne, A. O., Morrey, B. F., & An, K. N. (1990) · Journal of Biomechanics · doi:10.1016/0021-9290(90)90295-e · Cited by 288
Changes in the moment arms of the rotator cuff and deltoid muscles with abduction and rotation.
Otis, J. C., Jiang, C. C., Wickiewicz, T. L., Peterson, M. G., Warren, R. F., & Santner, T. J. (1994) · The Journal of Bone & Joint Surgery · doi:10.2106/00004623-199405000-00007 · Cited by 276
Does supraspinatus initiate shoulder abduction?
Reed, D., Cathers, I., Halaki, M., & Ginn, K. (2013) · Journal of Electromyography and Kinesiology · doi:10.1016/j.jelekin.2012.11.008 · Cited by 47
Metadata
- Authors
- POPPEN, N. K., & WALKER, P. S.
- Venue
- Clinical Orthopaedics and Related Research
- Published
- 1978-09
- Volume
- 135
- Issue
- 135
- Pages
- 165-170
- ISSN
- 0009-921X (ISSN-L)
- OpenAlex
- W4327847082
- Cited by
- 606
- References
- 0
- FWCI
- 1.30
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Forces at the Glenohumeral Joint in Abduction. https://app.cochat.ai/papers/10.1097/00003086-197809000-00035
- The paper
- POPPEN, N. K., & WALKER, P. S. (1978). Forces at the Glenohumeral Joint in Abduction. Clinical Orthopaedics and Related Research. https://doi.org/10.1097/00003086-197809000-00035
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
