What Is Cerebral Palsy?
Cerebral palsy, or CP, is a condition that makes it hard to keep your balance, move around, and control your muscles. It happens because the part of the brain that controls movement has problems. This can happen because the brain doesn’t develop properly or because it gets injured around the time of birth or shortly after.
Most people with CP are born with it, but sometimes it can happen after birth too. Cerebral palsy can cause anything from minor muscle problems to severe ones that make it hard to walk. Some people with CP also have trouble talking or thinking, but others have perfectly normal intelligence.
What Are the Types of Cerebral Palsy?
CP is divided into four main types, based on the movement involved:
- Spastic cerebral palsy
- Dyskinetic cerebral palsy
- Ataxic cerebral palsy
- Mixed cerebral palsy
Spastic cerebral palsy
The most common kind is spastic CP. If you have it, your muscles are stiff or tight, or they spasm.
Doctors break down spastic CP into three groups:
- Spastic diplegia mostly involves muscle stiffness in the legs. Tight muscles in your legs and hips might cause trouble walking because your legs turn in at the knees. This is also called scissoring.
- Spastic hemiplegia means one side of your body is affected. Your arm and leg on that side may be shorter and thinner, which might cause you to walk on your tiptoes. Some people with this type have a curved spine, called scoliosis. Seizures and speech problems can also be part of spastic hemiplegia.
- Spastic quadriplegia means all of your limbs are affected, as well as your torso and your face. You may also have seizures and trouble speaking if you have this type of CP. It’s the most serious kind of spastic CP.
Dyskinetic cerebral palsy
If you have dyskinetic CP, your muscle tone might be too tight or too loose. Your movements are uncontrolled: slow and twisting, or quick and jerky. If the muscles in your face or mouth are affected, you might frown, drool, and have trouble speaking.
Dyskinetic CP breaks down further into these types:
- Athetoid. Movements are writhing, slow, and curvy.
- Choreoathetoid. Movements are aimless and not controlled.
- Dystonic. Muscle tone is not normal.
Ataxic cerebral palsy
Ataxic CP, which is rare, causes problems with coordination and balance. You might be unsteady when you walk. You might also shake, which could make it hard to do tasks that need steadiness, such as writing.
Mixed cerebral palsy
People with this type of CP have symptoms of more than one type. Most people with mixed CP have a combination of spastic and dyskinetic.
What Causes Cerebral Palsy?
Doctors don’t always know what causes the brain damage that leads to CP. Here are some things that can hurt a growing brain:
- Bleeding in the brain before, during, or after birth
- Not enough blood reaching the brain
- Seizures in a newborn baby
- Certain genetic conditions
- Head injuries
What Are the Symptoms of Cerebral Palsy?
There are many different severities of CP, so the signs can vary a lot. One common sign is if your baby misses milestones that involve using their muscles, like rolling over, sitting up, standing, or walking. However, missing a milestone doesn’t always mean CP – it’s best to talk to your doctor if you’re concerned.
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It’s important to know that CP signs can appear right away or take some time. Here are some things to look for in babies under 6 months:
- Their head flops back when you pick them up from their back while sleeping.
- Their muscles feel very stiff or very loose.
- They arch their back and neck like they’re pushing away when you hold them.
- Their legs become stiff and cross each other (like scissors) when you lift them.
If your baby is older than 6 months, warning signs can include:
- They can’t roll over.
- They can’t bring their hands together.
- They have trouble bringing their hands to their mouth.
- When they reach it, it’s with only one hand. The other stays in a fist.
If your baby is older than 10 months, watch for these signs:
- They crawl by pushing off with one hand and one leg while dragging the other side of their body.
- They don’t crawl on all fours but scoot instead, or they hop on their knees.
If your baby is more than 1 year old and can’t stand without support or crawl, those are also possible signs of CP.
Some babies are diagnosed with CP soon after they’re born. Others aren’t diagnosed until years later.
A doctor may first notice problems with your baby’s movements or muscle tone. If you notice any problems like these at home, discuss what you see with the doctor.
Cerebral palsy doesn’t get worse as time passes, but often, symptoms aren’t noticed right away. For example, you won’t know that a 3-month-old can’t walk, so symptoms are usually recognized later.
How Is Cerebral Palsy Diagnosed?
At every scheduled visit, the doctor will check to see if your baby is keeping up with their milestones or if they’re delayed. They’ll watch how your baby moves to see if it’s in the normal range. And they’ll ask if you have any concerns.
Your doctor can measure subtle changes over time. It may be harder for a doctor to know for sure if a 9-month-old has a delay than if a 2½-year-old has a delay because it’s more likely that an earlier delay will be less obvious than a later one. This is why some children aren’t diagnosed until they’re older. Most children with cerebral palsy are diagnosed by the time they’re 2 years old. But if your baby’s symptoms are mild, they might not be diagnosed before they’re 4 or 5.
What Are the Tests for Cerebral Palsy?
When a doctor suspects that your child has CP, they may suggest that you see a specialist like a neurologist (an expert on the brain and nerves) or a doctor who has special training in child development.
The doctor will do a physical exam and watch your child’s movements. They’ll ask about your child’s health history, and they’ll want to hear any concerns that you have about the way your child moves. They may need to also order tests to check for problems. These include:
- Blood tests. Other health problems may cause symptoms that can look like CP. Your doctor may offer blood tests to rule out other conditions.
- CT scan. A CT scan uses X-ray technology to make images of the brain.
- MRI uses a strong magnet, not X-rays. It uses no radiation and can make higher-quality images than a CT scan. This can be helpful if the damage is hard to detect, but it may not always be needed.
- Ultrasound uses sound waves to make an image of your baby’s brain. It may not be as helpful as an MRI at finding slight problems in the brain, but it’s an easier test for your baby to take. It can be done only in very young babies before the soft spot gets too small.
- EEG (electroencephalogram). For this test, small electrodes will be stuck to your baby’s head to measure their brain waves. Sometimes, this exam can help diagnose epilepsy (seizure disorder), which is somewhat common in children with cerebral palsy.
How Is Cerebral Palsy Diagnosed?
Your doctor will look at the brain images and other test results. They’ll also review their exams of your baby over time, any milestone delays that they’ve had, plus what you’ve noticed at home.
Once your child is diagnosed with CP, they can begin to receive treatment. There is no cure, but your doctor may recommend physical therapy and muscle training.
Am I at Risk for Having a Child With CP?
You may have a condition while you’re pregnant that can increase the chances your baby will have CP. Among them are:
- Being pregnant with multiples, such as twins or triplets
- Having a health issue such as seizures or a problem with your thyroid gland
- Having blood that’s not compatible with your baby’s, which is also called Rh disease
- Coming in contact with a toxic substance such as mercury, which is found in some kinds of fish
Certain infections and viruses, when they strike during pregnancy, can increase the risk your baby will be born with cerebral palsy. They include:
- Rubella, or German measles, is a viral illness that can be prevented with a vaccine
- Chickenpox, also called varicella (a vaccine can prevent this contagious illness.)
- Cytomegalovirus, which causes flu-like symptoms in the mother
- Herpes, which can be passed from mother to unborn child and can damage the baby’s developing nervous system
- Toxoplasmosis, which is carried by parasites found in soil, cat feces, and tainted food
- Syphilis, a sexually transmitted bacterial infection
- Zika, a virus carried by mosquitoes
Can My Baby Have CP Even if I Don’t Have Any High-Risk Conditions?
Just as some illnesses in mothers raise the chances of CP, so do some infections in babies. Here are some of them:
- Bacterial meningitis. It causes swelling in the brain and tissues around the spinal cord.
- Viral encephalitis. This also can cause swelling around the brain and spinal cord.
- Severe jaundice (yellowing of the skin). This condition occurs when excessive bilirubin, a yellow pigment, accumulates in the blood.
Certain problems that happen in childbirth can also increase the risk of cerebral palsy. They include:
- Premature birth. This means any time under 37 weeks into the pregnancy.
- Breech position. This means a baby is settled feet-first rather than headfirst when labor begins.
- Low birth weight. If your baby is less than 5.5 pounds, the chances for CP go up.
- Complicated labor and delivery. This means problems with your baby’s breathing or circulatory system.
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