What is a brachial plexus injury like?

Arm paralysis.: Brachial plexus injuries (usually congenital) are serious morbid conditions resulting from trauma on the nerves travelling from the neck to the arm. They cause permanent paralysis of the affected arm. Physical therapy can help. Fortunately, this complication occurs very rarely even in cases of shoulder dystocia; its overall incidence is 0.04 to 0.2% of live births.