Damage to lower (C8 and T1) roots of brachial plexus as result of jerking, upward traction on arm as seen in breech and arm presentation birth injuries; leads to loss of all intrinsic muscles in hand, with wasting.
InsideSurgery Medical Information Blog
Details of surgical procedures, pathophysiology, signs and symptoms, and treatment of medical diseases,medical and surgical eponyms, and surgeons and surgery in the news