A cerebral palsy diagnosis rarely comes alone. Many children with CP also deal with seizures, vision problems, or speech delays. One of the most common co-occurring conditions is autism spectrum disorder (ASD), yet many families don’t learn about this connection until years after their child’s initial diagnosis.

A study published in Developmental Medicine and Child Neurology found that 6.9% of children with CP also have autism, compared to about 1% of children in the general population. That means children with CP are nearly seven times more likely to receive an autism diagnosis. Knowing what to look for and acting early can open the door to better treatment and a better quality of life for your child.

What Are Cerebral Palsy and Autism?

Cerebral palsy is caused by damage to the developing brain, usually before, during, or shortly after birth. It affects movement and muscle control. Depending on the type, CP can cause stiff muscles, weakness, poor balance, or difficulty walking.

Autism spectrum disorder affects how a person communicates, connects with others, and experiences the world. The word “spectrum” reflects how differently it shows up from person to person. Some children have mild challenges, while others need significant daily support. According to the Centers for Disease Control and Prevention, about 1 in 31 children in the U.S. is diagnosed with autism.

Both conditions involve disruptions in how the brain develops. That shared foundation helps explain why they so often occur together.

Why Do These Two Conditions Occur Together?

The connection between cerebral palsy and autism isn’t random. Many of the same risk factors, such as premature birth, low birth weight, oxygen deprivation during delivery, and prenatal infections, are associated with both conditions. When the developing brain is affected early, multiple systems can be impacted at once.

The type of CP matters, too. The CDC-funded ADDM Network study found that children with non-spastic CP — especially hypotonic CP, which involves unusually low muscle tone — had an autism co-occurrence rate of 18.4%. Among children with spastic CP, the most common type, the rate was 6%. This suggests that certain forms of CP share more neurological overlap with autism than others.

How Each Condition Affects the Other

When cerebral palsy and autism are both present, they can make each other harder to recognize and treat. A child with CP may have trouble moving, speaking clearly, or making eye contact,  all of which can look like autism symptoms. On the flip side, a child with autism may have sensory sensitivities that make CP-related discomfort feel more intense and harder to manage.

This overlap often delays diagnosis. A child’s communication problems might be chalked up entirely to CP, meaning an autism evaluation never happens. Or a child identified with autism might not get the physical therapy they need because the motor symptoms of CP go unnoticed. According to the Cerebral Palsy Guide, telling these two conditions apart is one of the hardest parts of caring for children who have both, and it takes specialists experienced with each.

Recognizing the Signs

Catching cerebral palsy and autism early gives children the best shot at effective treatment. Here’s what to watch for with each.

Early Signs of Cerebral Palsy

Cerebral palsy symptoms usually show up in the first one to two years of life and focus on movement and muscle control. Common signs include:

• Muscles that feel unusually stiff or floppy
• Missing motor milestones like rolling over, sitting up, or walking
• Awkward posture or uneven movement on one side of the body
• Trouble with coordination and frequent falls
• Difficulty feeding or swallowing as an infant

Early Signs of Autism

Autism signs often become clearer between 18 months and 3 years, when language and social skills start developing more rapidly. Watch for:

• Not responding when called by name
• Delayed or absent speech, or speech that sounds unusual
• Little eye contact or interest in interacting with others
• Preferring to play alone rather than with other children
• Repetitive movements like hand-flapping, rocking, or spinning objects
• Strong reactions to sounds, textures, lights, or other sensory input

If you notice signs from either list, bring them up with your child’s pediatrician right away. Early evaluation leads to earlier treatment, and earlier treatment leads to better outcomes.

Getting an Accurate Diagnosis

Diagnosing cerebral palsy and autism together requires a team approach. A pediatric neurologist, developmental pediatrician, psychologist, speech therapist, and occupational therapist each look at different parts of the picture. Brain imaging, like an MRI, can identify the neurological basis of CP, while behavioral assessments and developmental screenings evaluate for autism.

It’s important to know that having cerebral palsy does not automatically mean a child has autism, and vice versa. Each condition needs its own evaluation. The goal is a clear, complete view of your child’s specific challenges because the right treatment plan depends on understanding both conditions, not just one.

Treatment for Children with Cerebral Palsy and Autism

When a child has both cerebral palsy and autism, treatment needs to address both at the same time. A coordinated team of therapists, along with medical support when needed, gives children the strongest foundation for growth.

Physical Therapy

Physical therapy builds strength, balance, and coordination. Therapists use targeted exercises, gait training, and balance work to help children move more safely and independently in their daily lives.

Occupational Therapy

Occupational therapists focus on everyday skills like dressing, eating, and writing. For children with autism, sensory integration techniques help reduce sensitivities that get in the way. Adaptive tools like weighted utensils or specialized keyboards fill in the gaps where standard approaches fall short.

Speech and Language Therapy

CP can affect the muscles used for speaking, while autism affects the social side of communication. Speech therapists work on both. When verbal communication is very limited, they introduce alternative methods such as picture boards, communication apps, or speech-generating devices so every child has a way to be heard.

Behavioral Therapy

Applied behavior analysis (ABA) and similar approaches help children with autism build social skills and manage difficult behaviors. When CP is also present, behavioral therapists work alongside physical and occupational therapists so that goals support rather than conflict with one another.

Medications and Surgery

Some children benefit from medication to manage seizures, which affect about 41% of children with CP, as well as anxiety or behavioral challenges. For children with significant mobility problems, surgical procedures like muscle lengthening or tendon transfers can improve movement and make therapy more effective.

Your Next Step

If your child has cerebral palsy and you’re seeing signs of autism or the other way around, ask your pediatrician for a full evaluation by a team experienced in both conditions. Don’t wait for a referral to come to you. The earlier both conditions are identified and treated, the better the results.

Children with cerebral palsy and autism face real challenges, but with the right support, they can make meaningful progress. The key is a care plan that sees the whole child, not just one diagnosis at a time.

Located in Tampa, Florida, Children’s Cerebral Palsy serves families throughout the Tampa Bay area and across Florida. Dr. Siambanes and his team provide comprehensive evaluations for children with cerebral palsy and co-occurring conditions, including autism. Contact us to schedule a consultation and find out how we can help your child thrive.