Contributions of muscle imbalance and impaired growth to postural and osseous shoulder deformity following brachial plexus birth palsy: a computational simulation …

W Cheng, R Cornwall, DL Crouch, Z Li… - The Journal of hand …, 2015 - Elsevier
Purpose Two potential mechanisms leading to postural and osseous shoulder deformity
after brachial plexus birth palsy are muscle imbalance between functioning internal rotators
and paralyzed external rotators and impaired longitudinal growth of paralyzed muscles. Our
goal was to evaluate the combined and isolated effects of these 2 mechanisms on
transverse plane shoulder forces using a computational model of C5–6 brachial plexus
injury. Methods We modeled a C5–6 injury using a computational musculoskeletal upper …