Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Erb-Duchenne and Dejerine-Klumpke Palsies ?
    ### Response:
    The brachial plexus is a network of nerves that conducts signals from the spine to the shoulder, arm, and hand. Brachial plexus injuries are caused by damage to those nerves. Erb-Duchenne (Erb's) palsy refers to paralysis of the upper brachial plexus. Dejerine-Klumpke (Klumpke's) palsy refers to paralysis of the lower brachial plexus.
    