Dejerine-Klumpke paralysis: Lower brachial plexus paralysis occurring during birth, particularly with breech deliveries.
The medial pectoral nerve (medial anterior thoracic) arises from the medial cord of the brachial plexus and through it from the eighth cervical and first thoracic.
Klumpke paralysis (or Klumpke's palsy or Dejerine-Klumpke palsy) is palsy of the brachial plexus