What types of injuries are common with Erb’s palsy?

What types of injuries are common with Erb’s palsy?

There are four types of brachial plexus injuries:

• Avulsion is when the nerve rips away from the spine and is the most serious type of Erb's palsy.
• Rupture is when the nerve is torn, but not from the spine.
• Neuroma is when the nerve has torn and healed but has left scar tissue. The scarred tissue puts pressure on the injured nerve and prevents it from conducting signals to the muscles.
• Neurapraxia is when the nerve is stretched but not torn. Neurapraxia is the most common type of brachial plexus injury.