How Do I Know If My Child Has Cerebral Palsy?

If your baby moves in certain ways that don’t seem normal for a child his age, you may worry that he could have a condition like cerebral palsy.

Cerebral palsy (CP) is a disorder that affects the way that a person controls his muscles and movements. It’s caused by problems in brain areas that affect movement and muscle quality. Sometimes, a child’s brain didn’t fully form in these areas, which can lead to these problems.

Babies born premature are at greater risk of CP, as their brains may not have had time to fully develop. Other times, damage to the brain may take place during or after birth. Most often the cause is unknown.


Because there are very mild and very severe forms of cerebral palsy, a wide range of symptoms could signal this condition. Often, delays in baby milestones that are linked to muscle usage may be signs of CP. However, not all delays in milestones mean that your baby has cerebral palsy.

Some symptoms may appear at birth, while others may take longer to appear. 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 during scheduled visits. 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.


At every scheduled visit, the doctor will check to see if your baby is keeping up with his milestones or if he’s delayed. He’ll watch how your baby moves to see if it’s the normal range. And he’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, he might not be diagnosed before he’s 4 or 5.



When a doctor suspects that your child has CP, he 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. He’ll ask about your child’s health history, and he’ll want to hear any concerns that you have about the way your child moves. He may need to also order tests to check for problems. These include:

  • Blood tests. Other health problems may cause symptoms that can mimic CP. Your doctor may offer blood tests to rule out other conditions.
  • CT scan. Although rarely used anymore, a CT scan employs X-ray technology to create images of the brain. CT scans are only used to image the brain in cases of an emergency, such as trauma.
  • MRI uses a strong magnet, not X-rays. It uses no radiation and can produce 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 produce 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 only be done 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 his brain waves. Sometimes this exam can help diagnose epilepsy (seizure disorder), which is somewhat common in children with cerebral palsy.


To figure out whether or not your baby has cerebral palsy, the doctor will look at the brain images and other test results. He’ll also review his firsthand exams of your baby over time, any milestone delays that he’s had, plus what you’ve observed at home.

Once your child is diagnosed with CP, he can begin to receive treatment.

WebMD Medical Reference Reviewed by Roy Benaroch, MD on May 07, 2019



National Institute of Neurological Disorders and Stroke: “Cerebral palsy: Hope through research.”

American Academy of Pediatrics: “Cerebral palsy.”

Nemours Foundation: “Cerebral palsy.”

March of Dimes: “Developmental milestones for baby.”

Centers for Disease Control and Prevention: “Screening and diagnosis of cerebral palsy.”

March of Dimes: “Cerebral palsy.”

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