About Erb’s palsy
Newborns may develop Erb’s palsy during delivery. This may occur while your healthcare provider has to shift the baby’s head to one side to get their shoulders out, causing the brachial plexus nerves (from the neck to the shoulder) to stretch or even tear. A newborn can also develop Erb's palsy due to the way they were laying in the uterus during pregnancy and once labor begins.
What is Erb’s palsy?
Erb’s palsy, also known as Erb-Duchenne paralysis, is a nerve condition that results in weakness or loss of muscle function in the shoulder and arm. It primarily affects the upper group of the arm’s main nerves, specifically the severing of the upper trunk C5–C6 nerves. These nerves form part of the brachial plexus, a group of five nerves that connect the spine to the arm and hand. These nerves allow your shoulders, arms, and hands to feel and move.
Erb’s palsy can occur as a result of an injury sustained during birth or later in life. It’s most common in infants who injure their shoulders during delivery. Some cases resolve on their own, but healthcare providers may suggest exercises to help prevent permanent stiffness. There are four types of brachial plexus injuries associated with Erb’s palsy:
Avulsion, where the nerve rips away from the spine.
Rupture, where the nerve is torn, but not from the spine.
Neuroma, where the nerve has torn and healed but has left scar tissue that puts pressure on the injured nerve and prevents it from conducting signals to the muscles.
Neurapraxia, where the nerve is stretched but not torn. This is the most common type of brachial plexus injury.
Newborns sometimes develop Erb’s palsy during a difficult vaginal childbirth, or even during a cesarean section. During delivery, healthcare providers sometimes have to move the baby’s head to one side to make room for the delivery of their shoulders. In some cases, the stretching of the nerves causes damage, possibly even tears. This type of Erb’s palsy is also called a brachial plexus birth palsy, obstetric brachial plexus palsy, or brachial plexus birth injury.
Who does Erb’s palsy affect?
Erb’s palsy primarily affects newborns and can sometimes develop during a difficult vaginal childbirth, or even during a cesarean section. During delivery, healthcare providers sometimes have to move the baby’s head to one side to make room for the delivery of their shoulders. In some cases, the stretching of the nerves causes damage, possibly even tears. This type of Erb’s palsy is also called a brachial plexus birth palsy, obstetric brachial plexus palsy, or brachial plexus birth injury.
Erb’s palsy can also happen to adults who have traumatic injuries. It primarily affects the upper group of the arm’s main nerves, specifically the severing of the upper trunk C5–C6 nerves. These injuries arise most commonly, but not exclusively, from shoulder dystocia during a difficult birth.
Depending on the nature of the damage, the paralysis can either resolve on its own over months, necessitate rehabilitative therapy, or require surgery. The paralysis can be partial or complete; the damage to each nerve can range from bruising to tearing.
Erb’s palsy occurs in 0.9 to 2.6 per 1,000 live births or nearly 12,000 cases per year. It’s most common in larger infants who need to be pulled out during delivery because they’re stuck. Symptoms and Causes What are the signs and symptoms of Erb’s palsy? Erb’s palsy affects the shoulder, arm, and elbow. In general, your hand muscles aren’t affected, but your hands may experience tingling or numbness.
What causes Erb’s palsy (brachial plexus injuries) in adults?
Traffic accidents involving motorcycles usually cause brachial plexus injuries in teenagers and adults. Some other causes include gunshot or knife wounds, industrial accidents, accidents related to contact sports like football, surgical complications, or tumors.
What types of injuries are common with Erb’s palsy?
There are four types of brachial plexus injuries:
Avulsion: The nerve rips away from the spine and is the most serious type of Erb's palsy.
Rupture: The nerve is torn, but not from the spine.
Neuroma: 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: The nerve is stretched but not torn (also the most common type of injury).