A brachial plexus injury is an injury to the brachial plexus — the network of nerves that sends signals from your spine to your shoulder, arm and hand. A brachial plexus injury occurs when these nerves are stretched or, in the most serious cases, torn. This happens as result of your shoulder being pressed down forcefully while your head is pushed up and away from that shoulder.

Brachial plexus injuries are common in contact sports, but they frequently result from auto or motorcycle accidents or falls. Babies sometimes sustain brachial plexus injuries during birth. Other conditions, such as inflammation or tumors, may affect the brachial plexus.

Minor injuries may get better on their own, but severe brachial plexus injuries require surgical repair.

Signs and symptoms of a brachial plexus injury can vary greatly, depending on the severity and location of your injury. Usually only one arm is affected.

Less-severe injuries

Minor damage often occurs during contact sports, such as football or wrestling, when the brachial plexus nerves get stretched. Known as "stingers" or "burners," these injuries can produce the following symptoms:

  • A feeling like an electric shock or a burning sensation shooting down your arm
  • Numbness and weakness in your arm

These symptoms usually last only a few seconds or minutes, but in some people may linger for days or longer.

More-severe injuries

More-severe symptoms result from injuries that tear or rupture the nerves. The most serious brachial plexus injury (avulsion) occurs when the nerve root is torn from the spinal cord.

Signs and symptoms of more-severe injuries can include:

  • The ability to use your fingers, but not your shoulder or elbow muscles
  • The ability to use your arm but not your fingers
  • Complete lack of movement and feeling in your entire arm, including shoulder and hand
  • Severe pain

When to see a doctor

Brachial plexus injuries can cause permanent weakness or disability. Even if yours seems minor, you may need medical care. See your doctor if you have:

  • Recurrent burners and stingers
  • Weakness in your hand or arm
  • Weakness in any part of the arm following trauma
  • Neck pain
  • Symptoms in both arms
  • Symptoms in upper and lower limbs

Damage to the upper nerves that make up the brachial plexus tends to occur when your shoulder is forced down, and your neck stretches up and away from the injured shoulder. The lower nerves are more likely to be injured when your arm is forced above your head. These injuries can occur in several ways:

  • Contact sports. Many football players experience burners or stingers, which can occur when the nerves in the brachial plexus get stretched beyond their limit during collisions with other players.
  • Difficult births. Newborns can sustain brachial plexus injuries when there are problems during birth, such as a breech presentation or prolonged labor. If an infant's shoulders get wedged within the birth canal, the force used to pull the baby free also can damage the nerves in the brachial plexus. Most often, the upper nerves are injured, a condition called Erb's palsy. Total brachial plexus birth palsy occurs when both the upper and lower nerves are damaged.
  • Trauma. Vehicular accidents, especially motorcycle accidents, and boating accidents can result in brachial plexus injuries. Animal bites and bullet or knife wounds also can damage the brachial plexus.

A rare condition known as Parsonage-Turner syndrome (brachial plexitis) causes brachial plexus inflammation with no apparent shoulder injury.

Participating in contact sports, particularly football and wrestling, or being involved in high-speed accidents increases your risk of brachial plexus injury.

Given enough time, many brachial plexus injuries in both children and adults heal with no lasting damage. But some injuries can cause temporary or permanent problems:

  • Stiff joints. If you experience paralysis of your hand or arm, your joints can stiffen, making movement difficult, even if you regain use of your limb. For that reason, your doctor is likely to recommend ongoing physical therapy during your recovery.
  • Pain. This results from nerve damage and may become chronic.
  • Loss of feeling. If you lose feeling in your arm or hand, you run the risk of burning or injuring yourself without knowing it.
  • Muscle atrophy. Slow-growing nerves can take several years to regenerate. During that time, lack of use may cause the affected muscles to degenerate.
  • Permanent disability. How well you recover from a serious brachial plexus injury depends on a number of factors, including your age and the type, location and severity of the injury. Even with surgery, some people experience permanent disability, ranging from weakness in the hand, shoulder or arm to paralysis.

A number of tests may be used to help diagnose the type and severity of brachial plexus injuries. When you make your appointment, be sure to ask whether you need to prepare for these tests. For instance, you may need to stop taking certain medications for a few days or avoid using lotions the day of the test.

Other suggestions for getting the most from your appointment include:

  • Write down all your symptoms. Include how you were injured, how long you've had your symptoms and whether they've gotten worse over time.
  • Make a list of all medications, vitamins and herbs that you're taking.
  • If possible, take along a family member or friend. It can be difficult to absorb all the information you're given during an appointment. The person who accompanies you may remember something that you forgot or missed. This is especially important if your child has a brachial plexus injury. For most babies, the injury heals on its own without any lasting damage, but children who don't show improvement in the first three to six months of life may require surgery. This means parents face some difficult decisions, and it's often helpful to have a friend or family member who can offer advice and support.
  • Don't be afraid to ask questions. Children and adults with brachial plexus injuries have several options for restoring lost function. Be sure to ask your doctor about all the possibilities available to you or your child. If you run out of time, ask to speak with a nurse or have your doctor call you later.

To help diagnose the extent and severity of a brachial plexus injury, you may have one or more of the following tests:

  • Electromyography. This test checks the health of the nerves that help move your muscles. After small needle electrodes are inserted through your skin into a muscle, you're asked to contract that muscle. The amount of electrical activity generated provides information about how well the muscle responds when its nerves are stimulated. You may feel a little pain when the electrodes are inserted, but most people can complete the test without much discomfort.
  • Nerve conduction studies. These measure how quickly impulses are conducted through a nerve. Your nerve is stimulated through a patch-like electrode attached to your skin. This stimulation can feel like an electric shock of varying intensity. Although this test can be uncomfortable, you won't have any lingering pain afterward.
  • Magnetic resonance imaging (MRI). An MRI uses radio waves and a powerful magnetic field to visualize structures in your body. It often can show the extent of the damage caused by a brachial plexus injury. This test is typically used to determine if a nerve has been severed completely from your spinal cord. New methods of high resolution MRI, known as magnetic resonance neurography (MRN), may be used.
  • Computerized tomography (CT) myelography. A myelogram is a type of imaging that uses a contrast material, injected during a spinal tap, to produce a detailed picture of your spinal cord and nerve roots. In CT myelography, the images are taken with a CT scanner, a device that uses X-rays to create cross sections of body tissues. This test is sometimes performed when MRIs don't provide adequate information. Your doctor may tell you to drink more water the day before the test, and you may need to stop taking certain medications for a few days before a myelogram. Side effects of the test can include headache and nausea.

Nerves that have only been stretched have a fair chance of recovering on their own. But the healing process sometimes forms scar tissue that must be removed surgically to improve the nerve's function. Surgical repair is often required for nerves that have significant surrounding scar tissue or that have been cut or torn.

Types of surgery

In many cases, surgeons can take less important nerves from other parts of your body to help restore your arm's function:

  • Nerve graft. In this procedure, the damaged part of the brachial plexus is removed and replaced with sections of nerves cut from other parts of your body — rather like splicing a bit of new electrical wiring between two sections of old electrical wiring.
  • Nerve transfer. When the nerve root has been torn from the spinal cord, surgeons often take a less important nerve that's still attached to the spinal cord and hook it into the nerve that's no longer attached. In some cases, surgeons may perform this technique at a level close to the targeted muscle in an effort to speed up recovery rather than doing a repair (nerve graft) farther from the muscle. Nerve tissue grows slowly, about an inch a month, so it can take several years to fully recover after surgery. During the recovery period, you must keep your joints flexible with a program of exercises. Splints may be used to keep your hand from curling inward.

Partly because of the risk of muscle atrophy, surgery to repair brachial plexus nerves should ideally occur within three to six months after the injury. The success rate drops greatly if nerve surgery occurs more than a year after the injury.

Muscle transfer — a procedure in which your surgeon removes a less important muscle or tendon from another part of your body and transfers it to your arm — may be necessary if your arm muscles deteriorate.

Pain control

Pain from the most severe types of brachial plexus injuries has been described as a crushing sensation or a constant burning. Drugs containing opiates, such as codeine, are typically used immediately after the injury. Antidepressant and anticonvulsant medications also can be helpful. Pain control and a device called transcutaneous electrical nerve stimulation (TENS) sometimes provide relief. TENS involves using electrodes attached to your skin to deliver electrical impulses to nearby nerve pathways to help control and relieve pain. In extreme cases, surgery may be necessary.

Although damage to your brachial plexus often can't be prevented, you can take steps to reduce the risk of complications once an injury has occurred:

  • For yourself. If you temporarily lose the use of your hand or arm, daily range-of-motion exercises and physical therapy can help prevent joint stiffness.
  • For your child. If you're the parent of a child with Erb's palsy, it's vitally important that you exercise your child's joints and functioning muscles every day, beginning when your baby is about 3 weeks old. This helps prevent the joints from becoming permanently stiff and keeps your child's working muscles strong and healthy.
  • Experience. Mayo Clinic is a leading center for surgery to repair brachial plexus injuries. Mayo surgeons perform well over 100 of these delicate surgeries every year.
  • Special expertise. Mayo Clinic surgeons use advanced microsurgical techniques (including nerve and muscle transfers) to repair damaged brachial plexus nerves, muscles and tendons.
  • Team approach. Orthopedic surgeons, neurologists, neurosurgeons and physical medicine specialists work together to repair damage and restore as much function as possible.
  • Improved treatments. Mayo Clinic doctors are researching more effective treatments for people with brachial plexus injuries.

    Types

    Although some brachial plexus injuries are caused by tumors, compression and irradiation, the main causes of most injuries are trauma during childbirth and trauma due to an accident.

    Obstetric brachial plexus injury

    The most common pattern of brachial plexus injury to the baby during a difficult childbirth is called Erb's palsy, and it affects shoulder motion and elbow flexion. In more serious cases, obstetric brachial plexus injury can affect the baby's entire arm (called global palsy).

    In most babies with Erb's palsy, the brachial plexus injury heals without treatment, but about 10 percent of children will eventually need surgery. If the injury doesn't heal on its own in the first month, the baby should be evaluated at a center specializing in treating brachial plexus injuries.

    If surgery is needed, Mayo specialists have found best results from performing surgery four to six months after birth, before the nerve damage becomes permanent.

    Brachial plexus injury due to accident

    A brachial plexus injury can also occur as a result of an accident, such as a motorcycle crash, sports injury or fall. The injury is classified according to severity:

    • Stretched nerve — may recover without surgery
    • Ruptured nerve — nerve in the neck or shoulder which has torn completely
    • Avulsed nerve — nerve that has been pulled out completely from the spinal cord

    Some people with stretch injuries due to accidents recover independently, but others require surgery if function isn't recovered within three to six months.

  • Mayo Clinic in Rochester, Minn., is ranked among the Best Hospitals for neurology and neurosurgery and for orthopedics by U.S. News & World Report. Mayo Clinic in Scottsdale, Ariz., and Mayo Clinic in Jacksonville, Fla., are ranked high performing for neurology and neurosurgery and for orthopedics by U.S. News & World Report. Mayo Clinic also ranks among the Best Children's Hospitals for neurology and neurosurgery and for orthopedics.

    At Mayo Clinic, we assemble a team of specialists who take the time to listen and thoroughly understand your health issues and concerns. We tailor the care you receive to your personal health care needs. You can trust our specialists to collaborate and offer you the best possible outcomes, safety and service.

    Mayo Clinic is a not-for-profit medical institution that reinvests all earnings into improving medical practice, research and education. We're constantly involved in innovation and medical research, finding solutions to improve your care and quality of life. Your doctor or someone on your medical team is likely involved in research related to your condition.

    Our patients tell us that the quality of their interactions, our attention to detail and the efficiency of their visits mean health care — and trusted answers — like they've never experienced.

    Why Choose Mayo Clinic

    What Sets Mayo Clinic Apart

    Prompt referral and initial evaluation is needed after a brachial plexus injury, because nerve damage can be irreversible if not treated promptly. The medical team evaluates each patient to assess the severity of the injury, including a detailed history and exam, as well as special diagnostic tests, which may include:

    • X-ray
    • Magnetic resonance imaging (MRI) — produces three-dimensional, detailed images of the brachial plexus, blood vessels, spinal cord and shoulder joint
    • Computerized tomography (CT) myelogram — Dye is injected into the spinal fluid to detect nerve avulsion
    • Electromyogram (EMG) — tests electrical activity in muscles
    • Nerve conduction study — measures how quickly nerves are transmitting electrical signals

    A team approach to brachial plexus injury is key to successful recovery. At Mayo Clinic, a multidisciplinary team ensures that your treatment plan is customized for you and accounts for all aspects of your recovery.

    Your treatment will depend on the type and severity of your brachial plexus injury. Treatment options may include:

    • Initial "watch and wait." Some milder injuries will improve over several months, so your doctor may schedule regular appointments for three to six months to monitor your progress.
    • Therapy. Even if your injury heals on its own, physical and occupational therapy are typically recommended to help you regain full function.
    • Surgery. If there is no improvement within three to six months, or the injury is severe, surgery will be needed to improve nerve function.

    Surgery

    Surgery for brachial plexus injury should be performed by a skilled and experienced team. To prevent permanent nerve damage, surgery should occur within a few months of injury

    Mayo surgeons are highly skilled in all microsurgical techniques to make delicate repairs in the nerves, including:

    Nerve transfer

    • Neurolysis — clearing scar tissue from the nerve
    • Nerve graft — transplanting a nerve from the leg to reconnect damaged nerves
    • Nerve transfer — sewing an adjacent, functioning nerve or part of a nerve into a nonfunctioning nerve in an attempt to restore function in a paralyzed muscle
    • Free muscle transfer — transferring healthy muscles and nerves from the leg to the injured area to restore function to the arm
    • Capsule release — removing scar tissue and contractures to reduce pain and increase function in a joint
    • Tendon transfer — shifting a functioning tendon to a new location to restore function
    • Correction of the arm (osteotomy) — separating and reattaching bone to change the arm's alignment
    • Joint fusion — permanently joining the ends of two bones to increase stability and strength in an injured joint

    The goal of surgery for brachial plexus injury is to restore some function in your shoulder, elbow and hand. More than one surgery may be needed to regain additional function. Physical therapy and other treatments after surgery help to maximize your recovery.

    Mayo Clinic works with hundreds of insurance companies and is an in-network provider for millions of people. In most cases, Mayo Clinic doesn't require a physician referral. Some insurers require referrals or may have additional requirements for certain medical care. All appointments are prioritized on the basis of medical need.

    Mayo specialists in neurology, neurosurgery, orthopedic surgery, and physical medicine and rehabilitation at Mayo Clinic in Arizona work together to care for adults who have brachial plexus injuries.

    For appointments or more information, call the Central Appointment Office at 800-446-2279 (toll-free) 8 a.m. to 5 p.m. Mountain Standard Time, Monday through Friday or complete an online appointment request form.

    Mayo specialists in orthopedic surgery at Mayo Clinic in Florida coordinate diagnosis and treatment of brachial plexus injury in adults, including surgery. Other Mayo specialists are available, as needed.

    Diagnosis and treatment of infants who have Erb's palsy is offered at Nemours Children's Clinic in Jacksonville. More information about appointments at Nemours is available through the Mayo Clinic Department of Orthopedic Surgery at 904-953-2496.

    For appointments or more information, call the Central Appointment Office at 904-953-0853 8 a.m. to 5 p.m. Eastern time, Monday through Friday or complete an online appointment request form.

    Specialists at Mayo Clinic in Minnesota perform about 130 brachial plexus surgeries each year.

    The Brachial Plexus Clinic at Mayo Clinic in Minnesota brings together specialists from neurosurgery, orthopedic surgery, neurology and physical medicine and rehabilitation who work together to treat children and adults who have brachial plexus injuries. Many of these specialists also are active in basic science research and clinical research projects related to nerve disorders.

    The Brachial Plexus Clinic offers convenient appointment scheduling for patients and families, coordinating all needed visits within a short time. If necessary, surgery can also be scheduled quickly.

    For more information on the treatment of brachial plexus injury at Mayo Clinic in Minnesota, contact the Brachial Plexus Clinic at 507-538-1988 between 8 a.m. and 5 p.m. Central time, Monday to Friday.

    See information on patient services at the three Mayo Clinic locations, including transportation options and lodging.

    Doctors at Mayo Clinic are continually researching ways to improve diagnosis and treatment of brachial plexus injuries. Considerable research is being carried out in the area of peripheral nerve disorders by scientists in neurology, neurosurgery and orthopedic surgery.

    For example, Mayo researchers developed nerve tubes for peripheral nerve repair. These tubes are made of biomaterials invented at Mayo Clinic and researchers are now determining their effectiveness in supporting the regrowth of nerves. Another study is evaluating the relationship between specific enzymes and muscle function, then targeting high-enzyme areas to improve motor ability and mobility. Mayo researchers also developed new methods to measure motor recovery in regenerating nerves, and are using these tools to improve the techniques and results of nerve surgery.

    Publications

    See a list of publications by Mayo Clinic doctors on brachial plexus neuropathies on PubMed, a service of the National Library of Medicine.

    Feb. 24, 2011