ArticleJournal of biomechanics2022
Kinematic coupling of the glenohumeral and scapulothoracic joints generates humeral axial rotation.
Article in Journal of biomechanics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 13 citations in OpenAlex.
- Determination of inter-individual differences in humeral head centre translations in subjects with healthy shoulders.Royal Society open science · 2026Article
- Optimization of implant selection and positioning for reverse total shoulder arthroplasty using three-dimensional computed tomography-guided simulation software with scapulothoracic motion.Journal of shoulder and elbow arthroplasty · 2026Article
- Side-Specific Movement Strategies During Maximal Arm Elevation in Individuals With Stroke: A Cross-Sectional Study.Cureus · 2026Article
- Finite element analysis of the treatment of a minimally invasive approach combined with a novel anatomical locking plate for scapular body fractures.Journal of orthopaedic surgery and research · 2024Article
- High and low performers in internal rotation after reverse total shoulder arthroplasty: a biplane fluoroscopic study.Journal of shoulder and elbow surgery · 2023Article
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Corrections and comments
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
Abstract
Glenohumeral and scapulothoracic motion combine to generate humerothoracic motion, but their discrete contributions towards humerothoracic axial rotation have not been investigated. Understanding their contributions to axial rotation is important to judge the effects of pathology, surgical intervention, and physiotherapy. Therefore, the purpose of this study was to investigate the kinematic coupling between glenohumeral and scapulothoracic motion and determine their relative contributions towards axial rotation. Twenty healthy subjects (10 M/10F, ages 22-66) were previously recorded using biplane fluoroscopy while performing arm elevation in the coronal, scapular, and sagittal planes, and external rotation in 0° and 90° of abduction. Glenohumeral and scapulothoracic contributions towards axial rotation were computed by integrating the projection of glenohumeral and scapulothoracic angular velocity onto the humeral longitudinal axis, and analyzed using one dimensional statistical parametric mapping and linear regression. During arm elevation, scapulothoracic motion supplied 13-20° (76-94%) of axial rotation, mainly via scapulothoracic upward rotation. The contribution of scapulothoracic motion towards axial rotation was strongly correlated with glenohumeral plane of elevation during arm elevation. During external rotation, scapulothoracic motion contributed 10° (8%) towards axial rotation in 0° of abduction and 15° (15%) in 90° of abduction. The contribution of scapulothoracic motion towards humerothoracic axial rotation could explain the simultaneous changes in glenohumeral plane of elevation and axial rotation associated with some pathologies and surgeries. Understanding how humerothoracic motion results from the functional coupling of scapulothoracic and glenohumeral motions may inform diagnostic and treatment strategies by targeting the source of movement impairments in clinical populations.
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