A woman in a remote area is experiencing an extremely diffic…

A woman in a remote area is experiencing an extremely difficult labor. The Obstetrician used the baby’s right arm to help in the delivery. Several months after parturition, the mother realizes her baby cannot move his right arm normally. A medical examination of the infant showed that the deltoid of the affected arm was paralyzed since birth. In addition, as the child got older, he could not abduct his left arm. What is the most probable diagnosis and which roots are involved?