Dixit NN, McCormick CM, Cole JH, et al. - This study sought to explore the Influence of brachial plexus birth injury location on glenohumeral joint morphology. Researchers included 20 Sprague-Dawley rat pups who received preganglionic or postganglionic neurectomy on a single forelimb at postnatal days 3 to 4. They examined glenohumeral joints on affected and unaffected sides applying micro-computed tomography scans after death at 8 weeks after birth. They bilaterally assessed glenoid version, glenoid inclination, the glenoid and humeral head radius of curvature, and humeral head thickness and width. The data implied that glenoid deformities occur after postganglionic brachial plexus birth injury (BPBI) but not after preganglionic BPBI, whereas the humeral head is smaller after preganglionic injury, possibly implying an overall reduced biological growth rate in this group.