Klumpke’s Palsy, Injury to the Brachial Plexus

The brachial plexus is a group of nerves between the neck and shoulder that send signals to nerves in the arm – it is responsible for movement and feeling in the arms, hands, and fingers. When injury occurs to the lower portion of the brachial plexus, it can result in a condition known as Klumpke’s palsy. Those who suffer from Klumpke’s palsy often have extremely limited function in the lower arm, hand, and oftentimes the wrist.

Risk Factors for Klumpke’s Palsy

Klumpke’s palsy falls into a broader category of injury known as “neonatal brachial plexus palsy (NBPP).” Conditions in this category all stem from injury to the brachial plexus nerves, and therefore share the same predominant risk factors. Possible causes of and risk factors for Klumpke’s palsy and other forms of NBPP include:

What Causes Klumpke’s Palsy?

Excessive downward traction on a baby’s head and neck during delivery is the cause of Klumpke’s palsy.  All types of NBPP are caused by injury to the nerves that comprise the brachial plexus. Cases of Klumpke’s palsy are caused by injury that specifically impacts two distinct nerve types in the brachial plexus  the eighth cervical nerve (C8) and the first thoracic nerve (T1). The injuries that influence these nerves are classified based on the severity of the injury, and on the component of the nerves that it affects. The three categories of injury include:

  • Neuropraxia: A stretching of the nerves in the brachial plexus. This is often the result of ischemia or of compression from downward traction during delivery and operative delivery, and is the least severe form of Klumpke’s palsy.
  • Axonotmesis: A tearing of the brachial plexus nerves from the spine (known as avulsion) or other attached nerves (known as rupture). This is a moderate form of Klumpke’s palsy.
  • Neurotmesis: A scarring of nerves in the brachial plexus. This is often found in association with severe lesions to the around the brachial plexus, and is the most severe form of Klumpke’s palsy.

Symptoms of Klumpke’s Palsy

Klumpke’s palsy can manifest in several different ways depending on the severity of the injury, and the injury’s impact on other functions of the body. Klumpke’s palsy most often impacts only one side of the body, often leading to asymmetrical use or movement of the arms with a preference for the non-affected limb. The most common behaviors that signal Klumpke’s palsy may be present in a newborn or child include:

  • The appearance of a “claw-like” hand
  • Inability to move one hand, forearm, or wrist
  • Presence of drooping eyelids (miosis) in one eye due to Horner’s Syndrome, which often results from Klumpke’s palsy
  • Lack of sensation or weakness in one hand, forearm, or wrist
  • Severe pain
  • Crying or visible discomfort when the arm is touched or moved

How is Klumpke’s Palsy Diagnosed?

If the aforementioned behaviors are reported to or noticed by a medical professional, several measures may be taken in order to assess whether a child suffers from Klumpke’s palsy. In order to discern whether a baby or child is experiencing the kind of arm or hand weakness consistent with Klumpke’s palsy, a doctor will perform a preliminary physical examination. After this, the following diagnostic studies may be done in order to confirm a suspected diagnosis of Klumpke’s palsy:

  • Electromyogram (EMG): An electromyogram can test the electrical activity of a muscle in response to stimulation. If a professional finds that a child lacks the natural response to stimulation in the lower arms or hands, this can indicate the presence of Klumpke’s palsy.
  • Imaging Studies: Imaging studies, such as an x-ray, ultrasound, or MRI, may be performed in order to spot damage to the bones or joints of the brachial plexus region, which may signify the presence of the condition.
  • Nerve Conduction Studies: These studies can measure the extent of the damage to the brachial plexus nerves, which can help classify the injury as neuropraxia, axonotmesis, or neurotmesis.

Treatment and Therapy for Klumpke’s Palsy

Treatment of Klumpke’s palsy injury in babies and children is heavily dependent on the severity and the classification of the injury. Less severe cases of Klumpke’s palsy can often be treated noninvasively through the following methods:

  • Immobilization of Affected Limb: If Klumpke’s palsy is mild or moderate and is noticed shortly after birth, the affected arm may be immobilized (pinned across the body) for up to two weeks. This prevents any further injury and allows the mildly injured nerves to heal. In conjunction with this, some providers recommend gentle massaging of the arm.
  • Physical Therapy: Physical therapy is often needed to help children with Klumpke’s palsy. Therapeutic rehabilitation and range of motion activities are often utilized to encourage healing and promote proper use of the arm, hand, fingers, or wrist.
  • Medications: In some cases of Klumpke’s palsy, affected individuals will experience pain. Doctors can prescribe medications to ease pain and relieve negative sensations.

If the above methods of treatment are not effective, surgery may be needed to repair nerves in the brachial plexus. Common types of surgery used to treat Klumpke’s palsy include:

  • Nerve Transfer: During this procedure, a nerve from a different muscle or muscle group can be moved to the brachial plexus region to replace the affected muscle, thereby restoring function to the arm, hand, wrist, or fingers.
  • Nerve Graft: In a nerve graft surgery, a small portion of a different “donor” nerve can be placed into the affected region to repair nerve ruptures.
  • Muscle Transfer: If Klumpke’s palsy is severe, it can lead to deterioration of the muscles in the affected limb. A muscle transfer can restore function by moving a muscle from a different part of the body into the affected limb.

Long-Term Outcomes of Klumpke’s Palsy

The majority of babies with mild or moderate Klumpke’s palsy can recover from their injuries within a year if the proper therapies and treatments are administered. If, however, Klumpke’s palsy is severe or isn’t treated in a timely manner, a child may suffer from limited movement or paralysis in the affected arm for much longer. In rare cases, these severe injuries can impact an individual over an entire lifetime.

Reiter & Walsh, P.C. | Michigan Birth Injury Attorneys Helping Children Since 1997

ABC Law Centers Birth Injury Attorneys

Klumpke’s palsy cases require extensive knowledge of both the law and medicine. If you are seeking the help of a Klumpke’s palsy lawyer, it is very important to choose a lawyer and firm that focus solely on birth injury cases. Reiter & Walsh ABC Law Centers is a national birth injury law firm that has been helping children with birth injuries since it was formed in 1997.

If your child was diagnosed with a birth injury, such as Klumpke’s palsy, cerebral palsy, a seizure disorder or hypoxic-ischemic encephalopathy (HIE), the award-winning birth injury lawyers at ABC Law Centers can help. We have helped children throughout the country obtain compensation for lifelong treatment, therapy, and a secure future, and we give personal attention to each child and family we represent. Email or call Reiter & Walsh ABC Law Centers at 866-822-7484 for a free case evaluation.

Free Case Review  |  Available 24/7  |  No Fee Until We Win

Call our toll-free phone line at 866-746-1520
Press the Live Chat button on your browser
Complete Our Online Contact Form

Related Reading:


  • Barry Russman, “Neonatal brachial plexus palsy,” UpToDate (2016).
  • Genetic and Rare Diseases Information Center, “Klumpke paralysis,” National Center for Advancing Translational Sciences (2010).
  • Neurology and Neurosurgery, “Klumpke’s Palsy,” Baptist Health (2017).

This page is intended solely as an educational tool. It is not intended as – and should not be mistaken for – medical advice.