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newborn erb's palsy
Home > Birth Injury Overview > Erb’s Palsy Overview > Erb’s Palsy Causes
Last Updated: March 09, 2022

Erb’s Palsy Causes

Page Medically Reviewed and Edited by Gina Jansheski, M.D.
Page Medically Reviewed and Edited by Gina Jansheski, M.D.

This article has been fact checked by a Board Certified Pediatrician. Sources of information for the article are listed at the bottom.

For any content issues please Contact Us.

Erb’s palsy is caused by damage to the nerves of the brachial plexus.[1] Damage most often occurs during childbirth, when complications lead to a stretching of the nerves along the neck. Accidents or physical trauma can cause Erb’s palsy at any age.

Damage During Childbirth

The number one cause of Erb’s palsy is damage to the brachial plexus nerves during childbirth. The damage occurs when the head and arm or shoulder get stretched apart.

The nerves run from the spine to the neck and then to the shoulder and down the arm, so pulling or stretching the body in this way also stretches the nerves.

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Mild stretching can stress the nerves, which is considered minor damage that will heal naturally and can be helped by physical therapy.

Various childbirth complications can lead to stretching that causes mild to severe damage. A greater degree of stretching can damage the nerves more severely. They can actually become torn, or in the worst cases, ripped away from the spinal cord.

Manipulating the Baby During Childbirth

There are many different factors that can lead to nerve damage during childbirth, some involving the doctor or other medical professional manipulating the baby in such a way that the brachial plexus nerves are stretched and become damaged.

For instance, the head and neck may get pulled to the side as the shoulders are delivered from the birth canal.

Another possibility is that the baby’s head gets pulled while the shoulders are still in the birth canal. The use of instruments during difficult deliveries, such as forceps or vacuum, can also cause stretching of the nerves.

Large Baby

When an infant is abnormally large, it can be difficult to deliver through the birth canal. Sometimes the shoulders can become stuck, creating the need for emergent interventions. This can lead to the head, shoulder, or arm being pulled or tugged in such a way that the nerves get damaged.[2]

If a child is abnormally large, it can usually be detected in the last few weeks of pregnancy. At that point, a doctor must decide if a cesarean section should be done to avoid a difficult birth that can lead to Erb’s palsy and other complications.

Breech Birth

A breech birth is another factor that increases the risk of Erb’s palsy. This is a birth in which the baby’s buttocks or feet emerge through the birth canal first, whereas, in a normal delivery, the head comes out first.

Erb’s palsy can occur because, as the doctor pulls the baby’s feet out first, the arms are pulled upward over the head.

This can put stress on the brachial plexus and cause damage. As with a very large baby, a breech position is often detected in advance of labor and may lead to the decision for cesarean section.

Erb’s Palsy During Cesarean Section

A cesarean section (c-section), the surgical delivery of the baby through an incision in the abdomen, is usually done to avoid high-risk births. If a delivery is expected to be prolonged, or breech, or to have other significant risk factors, a doctor may decide to perform a cesarean section.

Erb’s palsy is generally not a risk of c-section deliveries, but it may happen in very rare cases. Only about one percent of cases of Erb’s palsy occurs during cesarean section births.[3]

Erb’s Palsy at Any Age

Erb’s palsy is overwhelmingly a condition of childbirth and infancy, but it is possible to sustain injuries to the brachial plexus at any age.

Any kind of accident, violence, or other forms of injury that stretches those particular nerves can cause enough damage to trigger Erb’s palsy.

Some of the more common ways someone might injure nerves of the brachial plexus include:

  • Contact in sports like football
  • Trauma from motor vehicle collisions
  • Bullet wounds
  • Falls
  • Tumors that put pressure on the nerves

Whatever the cause of Erb’s palsy, for infants especially, the damage is usually short-lived. The nerves are often able to heal naturally, given enough time, and most babies will grow into healthy children with no lasting effects. For those that have more severe injuries, the results may be permanent but are not usually severe.

A birth injury lawyer can help you take legal action to recover damages in the case of medical malpractice.

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References

  1. Brachial plexus injury in newborns: MedlinePlus Medical Encyclopedia. (n.d.). MedlinePlus - Health Information from the National Library of Medicine.
    Retrieved from: https://medlineplus.gov/ency/article/001395.htm
  2. Erb’s palsy – Who is to blame and what will happen? (n.d.). PubMed Central (PMC). National Institutes of Health.
    Retrieved from: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2724163/
  3. Brachial plexus injury - Symptoms and causes. (2018, December 5). Mayo Clinic.
    Retrieved from: https://www.mayoclinic.org/diseases-conditions/brachial-plexus-injury/symptoms-causes/dxc-20127374
View All References
Page Medically Reviewed and Edited by Gina Jansheski, M.D.

Page Medically Reviewed and Edited by Gina Jansheski, M.D.

Gina Jansheski, M.D. is a Board Certified Pediatrician and a Fellow of the American Academy of Pediatrics. She has been a practicing pediatrician for over 20 years, working primarily with hospitalized patients and children with special needs.

See Full Bio

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