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Glenohumeral kinematics and capsulo-ligamentous strain resulting from laxity exams
Glenohumeral kinematics and capsulo-ligamentous strain resulting from laxity exams
- Source :
- Clinical Biomechanics. 15:735-742
- Publication Year :
- 2000
- Publisher :
- Elsevier BV, 2000.
-
Abstract
- Objective. Identification and quantification of strain in shoulder capsular-ligamentous structures during clinical exams and validation of this testing on cadavers. Methods . Mercury strain gauges were sutured in seven locations on shoulders from cadavers. An electromagnetic tracker quantified humeral head translations during laxity exams. Strain and humeral position were acquired during performance of Sulcus, Feagin, Apprehension, Load and Shift, Drawer, and Hawkins tests. Results . Anterior humeral head translation in neutral position was primarily constrained by the coracohumeral ligament. With the arm abducted, anterior middle and inferior ligaments also became active. External rotation and abduction activated inferior and middle capsules. Posterior capsule constrained motion for posterior tests in neutral and abduction. Superior and inferior capsular ligaments were active during inferior tests in neutral position. With abduction, inferior ligaments provided primary translation constraint. Conclusion . Study of kinematics and strain evaluation on cadavers can yield useful information on mechanisms of glenohumeral instability. Relevance This study clarifies the contribution of specific structures of the shoulder to strain in the joint capsule. It also identifies which structures are challenged by provocative laxity exams commonly used by orthopaedic physicians.
- Subjects :
- Joint Instability
Rotation
Shoulders
Movement
Biophysics
Kinematics
Weight-Bearing
Cadaver
Joint capsule
Confidence Intervals
medicine
Ligamentous Strain
Humans
Orthopedics and Sports Medicine
Analysis of Variance
Shoulder Joint
Glenohumeral instability
business.industry
Signal Processing, Computer-Assisted
Anatomy
Humerus
Sulcus
medicine.anatomical_structure
Coracohumeral ligament
Ligaments, Articular
Regression Analysis
Stress, Mechanical
business
Electromagnetic Phenomena
Joint Capsule
Subjects
Details
- ISSN :
- 02680033
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- Clinical Biomechanics
- Accession number :
- edsair.doi.dedup.....f8be39b1f71d667d599a4dc842446e93
- Full Text :
- https://doi.org/10.1016/s0268-0033(00)00041-3