Concerning brachial plexus, which of the following facts are true: (A) Formed by spinal nerve C5- C8 and T1, (B) Most common site of injury is upper trunk, (C) Injury may occur, during breech delivery, (D) Radial nerve is branch of medial cord
Answer is A. Brachial plexus is formed by the anterior primary rami of spinal nerves C5-C8 and T1, with contribution from the anterior primary rami of C4 and T2. Radial nerve is a branch of posterior cord. Injury to the upper trunk causes Erb&;s paralysis. B D Chaurasia 7th edition Page no: 58