During an examination, the physical therapist observes the p…

During an examination, the physical therapist observes the patient’s posture noting wrist flexion, elbow extension, shoulder internal rotation and scapular winging of the right arm. Manual muscle testing revealed 2/5 strength in shoulder external rotators and abductors and elbow flexors and 4/5 strength in elbow extensors and wrist and finger flexors. If these findings are due to a neurological injury, where is the most likely location of the injury?