The brachial plexus is the network of nerves that follow a set pattern of branching and rejoining as they run from the neck into the shoulder, arm and hand. When these nerves are abnormally stretched or torn during a difficult delivery, a newborn may have a weak or limp arm. This guide explains how the injury is recognised, how Erb's palsy differs from more severe injuries, what parents can do at home, when surgery comes into the picture and what recovery may look like. If you have only just noticed that your baby is not using one arm, you are probably reading this with a lot on your mind. Many of these babies recover well spontaneously. However, some need specialist care, and the aim of an early assessment is to find out which group your child belongs to.
Quick Answer
A brachial plexus birth injury happens when the nerves supplying the arm are stretched or torn during delivery, leaving the baby's arm weak or limp. Erb's palsy is the most common pattern and mainly affects the shoulder and elbow. Many babies improve over the first weeks and months with gentle handling, positioning and physiotherapy. If recovery is incomplete or stops progressing, a hand and nerve surgeon may discuss nerve surgery. Because timing matters, a baby who is not improving should see a Hand Surgeon early rather than wait indefinitely.
What Is the Brachial Plexus?
Think of the brachial plexus as a bundle of 5 cables. It starts at the spinal cord in the neck, passes under the collarbone and then branches in a set pattern out to the shoulder, arm, forearm and hand. The nerves carry movement signals from the brain to the muscles and bring sensation back from the skin. Five main nerve roots named C5, C6, C7, C8 and T1 originate from the spine. They join to form the plexus. The upper roots (C5 and C6) mostly control lifting the arm at the shoulder and bending the elbow. The lower roots (C8 and T1) mostly control the wrist and the muscles of the hand. Which roots are injured decides which movements are affected. That is why two babies with the same diagnosis can look quite different.
What Is a Brachial Plexus Birth Injury?
A brachial plexus birth injury, also called obstetric brachial plexus palsy or OBPP in short, is nerve damage that occurs during delivery. "Palsy" simply means weakness or loss of movement. It is usually spotted in the first hours or days, when a parent or paediatrician sees one arm kicking and waving while the other lies still. It most often affects one side only. A broken collarbone or upper arm bone can sometimes occur alongside the nerve injury, so the doctor will usually examine the whole shoulder and arm rather than the nerves alone.
What Is Erb's Palsy?
Erb's palsy is the most common type of brachial plexus birth injury. It involves the upper nerve roots, mainly C5 and C6 and sometimes C7. The shoulder elevation and elbow flexion are weak, while the hand and wrist often keeps some movement. A baby with Erb's palsy typically holds the arm against the body with the shoulder turned inward, the elbow straight and the palm facing backward. Doctors sometimes call this the "waiter's tip" position. The wrist and fingers may still move, and the baby may grip a finger placed in the palm. The condition is named after Wilhelm Erb, a German physician who described the pattern in the nineteenth century.
What Are the Types of Brachial Plexus Injury in Babies?
Doctors describe the injury in two ways. One is which nerve roots are involved. The other is what kind of damage the nerve has taken.
Which nerve roots are affected?
In an upper plexus injury (Erb's palsy), the shoulder and elbow are weak but the hand usually works. An extended Erb's palsy reaches the C7 root as well, so the wrist and fingers may also be weaker. In a total plexus injury, every root is affected and the whole arm, including the hand, may be limp, sometimes with reduced feeling. A lower plexus injury, known as Klumpke's palsy, mainly affects the hand and wrist and is uncommon in birth injuries.
What kind of nerve damage has occurred?
The same nerve can be hurt in different ways, and this is what most strongly shapes recovery.
- Neurapraxia: the nerve is bruised or stretched but remains intact. This type often recovers on its own, usually over weeks to months.
- Axonotmesis: the inner fibres are damaged but the outer covering is intact. Recovery is possible but slower and may be incomplete.
- Neurotmesis (rupture): the nerve is torn. It cannot repair itself, and surgery may be considered.
- Avulsion: the nerve root has been pulled away from the spinal cord. This is the most serious type, and because the root cannot simply be sewn back, surgeons may use other nearby nerves to restore movement. In the first days, the hand surgeon often cannot tell which type a baby has, but can assess and document what is working and what is not. This is the baseline assessment. Subsequent evaluations show what has recovered spontaneously and what has not. That is why repeated follow-up over the first weeks and months is so central to the assessment.
What Causes Brachial Plexus Injury During Birth?
The nerves are injured when the neck and shoulder are pulled in opposite directions during delivery. This can happen when the baby's shoulder gets caught behind the mother's pelvic bone, a situation called shoulder dystocia, or in other kinds of difficult delivery. A larger baby, a long or difficult labour and assisted delivery are all associated with a higher chance of this injury. It can also occur without any of them, including after a caesarean birth, and sometimes no single cause can be found. Many parents ask themselves whether they could have prevented it. In most cases the injury happened during a delivery that was already difficult, and nobody did anything wrong. Putting that question aside makes it easier to focus on what can be done for the arm now.
How Do I Know If My Baby Has a Brachial Plexus Injury?
The usual sign is an arm that moves less than the other, or not at all, from the first days of life. Parents may notice one or more of the following that: *the arm hangs limply at the baby's side. *the baby kicks and waves one arm but not the other. *the arm rests turned inward with a straight elbow. *the hand stays floppy or fisted. *the baby cries when that arm is moved, which may point to a fracture. *one eyelid droops or the pupil looks different on the same side, which can occur with severe injuries and is called Horner's syndrome. *Newborn reflexes help the doctor. In the Moro (startle) reflex, both arms normally open outward and then come back in. If one arm does not take part, it can suggest weakness. Seek urgent medical attention if your newborn has a limp arm along with breathing difficulty, trouble feeding, a drooping eyelid, or a swollen and very painful shoulder or arm. Go to the emergency department for an urgent evaluation if your baby has a fever or seems unwell or inconsolable. Seek an urgent hand surgeon's opinion if the baby has reduced or altered movement of the arm.
How Is a Brachial Plexus Injury Diagnosed?
It starts with the story of the birth and a careful examination. A paediatrician, paediatric orthopaedic surgeon or hand and nerve surgeon watches how the baby moves, tests muscle groups as far as a baby allows and checks reflexes. Some babies need further tests. An X-ray can pick up a broken collarbone, a fractured upper arm or a shoulder joint that is not sitting properly. An MRI scan may be used to look at the nerve roots, usually when surgery is being considered, and in young babies it can require sedation or anaesthesia, so the surgeon will explain whether it is necessary. Nerve conduction studies and electromyography measure electrical activity in nerves and muscles, but their use in newborns is limited and the surgeon decides if and when they add anything. No single test replaces repeated clinical examination. Many specialists see a baby every few weeks at first, because how movement returns over time is the most useful guide.
What Can I Do at Home in the First Few Weeks?
The early goals are simple. Protect the arm, keep the joints supple and give the nerves time to heal. Your paediatrician, physiotherapist or surgeon should give advice specific to your baby, and what follows is general. Support the arm and shoulder when you lift, dress and bathe your baby, and avoid pulling the baby up by the hand or arm. If there is a fracture, the doctor may ask you to position the arm in a particular way for a short period. A weak arm tends to stiffen because it is not moving by itself. A therapist can show you how to move the shoulder, elbow, wrist and fingers through a comfortable range. These are slow, gentle movements and should never be forced. If your baby is crying or tense, stop and try again later. Play helps too. Place toys where your baby has to reach with the affected arm, give supervised tummy time while awake, and talk or sing from the weaker side so your baby turns that way. Please avoid vigorous massage, oils worked deep into the shoulder, traditional bone-setting or any manipulation of the arm. None of these can stand in for a medical assessment, and some can hurt a baby's shoulder.
What Exercises Help Babies With Erb's Palsy?
Physiotherapy and hand therapy form the backbone of non-surgical care. The exercises depend on what your baby can and cannot do, and they change as the baby grows, so they should come from your child's therapist and not from a general list. The goals are usually the same. Keep the shoulder, elbow, wrist and finger joints flexible. Encourage the baby to use the arm in play. Build strength as muscles begin to work again. Support two-handed play, which matters for early development. Some babies are given a splint to hold the wrist or elbow in a good position, and the surgeon or therapist decides whether that is suitable and for how long. Parents end up doing most of the daily therapy. Ask the therapist to watch you do the exercises and correct you. Most families find a short routine repeated through the day easier to maintain than one long session.
How Much Will My Baby Recover?
Many babies with a brachial plexus birth injury improve, and a good number recover without surgery. How much depends mainly on the severity and type of nerve injury. Babies with milder injuries, and those who start to show movement early, generally have a better outlook. The first few months give a useful picture. Hand Surgery specialists often look at whether a baby regains certain movements, such as bending the elbow against gravity, by particular ages. These milestones help decide whether a child is likely to recover enough without an operation. Recovery can still be incomplete after good treatment. Some children are left with weakness, limited turning of the shoulder or a slightly smaller arm on the affected side. A specialist who has examined your child can explain what to expect, but no one can promise a particular result. Nerves regrow slowly, so movement may come back gradually over months and sometimes years. Early recovery is not the same as final recovery, and a baby who improves slowly may still be doing well.
When Is Surgery Needed for Brachial Plexus Birth Injury?
Surgery is considered when recovery is not progressing as expected, or when the injury is of a type that cannot heal on its own. Most babies are first managed with observation, physiotherapy and regular reviews, and many never need an operation. A surgeon may recommend surgery when there is little or no return of key movements, especially bending the elbow, over the first few months. It may also come up for discussion when the examination suggests a rupture or avulsion instead of a stretch injury, when the whole arm and hand are limp, or when recovery begins and then stops. Timing matters. Nerve surgery is generally thought to work best when done early in the first few months of life, and the decision therefore is usually made in the first two to three months based on how the baby is recovering. The right moment differs from baby to baby, and your surgeon should explain the reasoning. If you are told to "wait and see", it is fair to ask what exactly you are waiting to see and when the next review will be. Elbow flexion is the earliest sign of recovery. Waiting without a plan can narrow the options, while operating on a baby who would have recovered anyway is no help either. A hand and nerve surgeon who regularly assesses babies with this injury is best placed to strike that balance.
What Does Surgery for Brachial Plexus Birth Injury Involve?
The operation is done under general anaesthesia with an operating microscope, because the nerves are very fine. The aim is to restore a route for signals to reach the muscles. The exact plan depends on what the surgeon finds. If a nerve is torn, the surgeon may remove the damaged section and bridge the gap with a nerve graft, which is a piece of nerve taken from another part of the body, often a minor sensory nerve in the leg. The graft acts as a channel along which the nerve fibres can regrow. If the root has been pulled out of the spinal cord, a working nerve nearby may be connected to the nerve supplying a paralysed muscle, so that the working nerve takes over the job. This is called a nerve transfer or neurotization, and it is used in selected babies depending on the injury. Some children develop shoulder tightness, joint problems or limited arm rotation as they grow, even when the nerves have recovered well. Later procedures such as releasing a tight muscle, moving a tendon or correcting the shoulder joint may then be considered. These are planned individually. Like any surgery, this carries risks. They include infection, bleeding, scarring, anaesthetic risks and the possibility that the nerve does not recover as hoped. Nerve surgery does not give a normal arm in every case, and it can take many months or years before the result becomes clear. The arm may be protected for about 3 weeks afterwards, and therapy continues. The surgeon and therapist give individual instructions to maintain mobility.
Could It Be Something Other Than Erb's Palsy?
A baby who is not moving an arm does not always have a nerve injury. A broken collarbone or upper arm bone causes pain and reduced movement. An infection in a bone or joint can also make a baby stop using an arm, and that needs urgent treatment. Rarely, a problem in the spinal cord or brain is responsible. For this reason, any newborn with a limp or painful arm should be examined by a hand surgeon and not assumed to have Erb's palsy. If your baby has a fever, swelling, redness or seems in distress, seek urgent pediatric medical care.
Is Brachial Plexus Injury Different in Adults?
Adults can injure the brachial plexus too, most often in road accidents, falls or sports. The nerves are the same, but the situation is not. A baby's nerves can recover in ways that adult nerves often cannot, and a growing child's arm changes over time, which is why children need follow-up for years and not just months.
Brachial Plexus Injury Treatment in Pune
Parents in Maharashtra often ask whether they must travel far to see a specialist. Dr. Pankaj Jindal has practised hand surgery in Pune since 1991, and his practice, Jindal Hand Surgery, lists paralysis and nerve injury among its treatment areas. He was trained under Prof. Algimantas Narakas in Switzerland and Dr. David Chuang in Taiwan. Parents can contact the practice to arrange a consultation and talk through their child's examination and options. Families coming from another city or country can find a page for patients from outside Pune on the practice's website.
Questions to Ask Your Child's Surgeon
It is easy to forget things in a consultation, so write your questions down beforehand. You might ask which nerve roots seem to be affected, whether the arm is likely to improve without surgery, which movements the surgeon will be watching for and by what age, and how often your baby should be reviewed. If surgery is suggested, ask what the plan is, what the risks are and what therapy will be needed before and after. It also helps to ask who you can contact if you are worried between appointments.
When Should I See a Specialist?
See a doctor, ideally a hand surgeon, as soon as you notice your baby is not moving an arm. A paediatrician can start the assessment and refer you to a hand and nerve surgeon or a centre that treats brachial plexus injuries. A specialist opinion is worth seeking if there has been no improvement after the first few weeks, if the hand is limp or the whole arm is not moving, if one eyelid droops or the pupil looks different, if improvement starts and then stalls, or if you are unsure about the advice you have received and want a second opinion.
Key Takeaways
A brachial plexus injury in a baby is damage to the nerves supplying the arm, often after a difficult delivery. Erb's palsy is the most common pattern. Severity ranges from a mild stretch to a tear or root avulsion, so outcomes differ widely between babies. Many babies improve with gentle handling, physiotherapy and regular review, and not every baby needs surgery. Surgery is considered when recovery is not progressing as expected, and timing in the early months matters. Elbow flexion by the end of two months is an important sign of improvement. Recovery is slow and may be incomplete, so follow-up through childhood is worthwhile.
- Any newborn with a limp or painful arm needs a hand surgeon's assessment to rule out other causes.
Final Thoughts
Learning that your baby's arm is not working properly is hard for any parent. The picture usually becomes clearer over the first weeks as your baby's movements are watched, and a steady follow-up plan helps you make decisions without panic. Ask questions, keep up the exercises your therapist teaches you and feel free to get a second opinion if something does not sit right. If you would like a hand surgeon to examine your baby and explain the options, you can contact Jindal Hand Surgery in Pune through the official website.
