A brachial plexus injury refers to the damage of a group of nerves that run from the upper spine to the shoulder, arm and hand. There are several synonyms for this type of injury, including brachial neuropathy, brachial neuritis, Erb's palsy, and klumpke paralysis. Brachial neuropathy is a type of peripheral neuropathy that specifically affects the brachial plexus and can cause pain, weakness, and numbness in the affected areas. Brachial neuritis is the inflammation of the brachial plexus, which can also lead to pain and weakness. Erb's palsy and klumpke paralysis are two types of brachial plexus injuries that occur at birth and can cause lasting arm or hand weakness.