Early Signs of Cerebral Palsy in Babies 0-12 Months

You are here because something feels different about your baby. Maybe they are not moving the way other babies do. Maybe they feel stiff when you pick them up, or floppy when you hold them. Maybe you have noticed that one hand stays clenched while the other opens freely. Whatever brought you here, you are doing the right thing by looking for answers. Early recognition of cerebral palsy can change your child’s future.

Why CP Is Hard to Spot in Newborns

Cerebral palsy is a group of permanent movement disorders caused by damage to the developing brain, most often before or during birth. But here is the challenge: newborns do not do very much. They sleep, eat, cry, and move in reflexive patterns. It is difficult to assess voluntary movement in a baby who is mostly operating on reflexes.

In the first weeks of life, many of the signs that will later point to CP are masked by normal newborn behavior. High muscle tone can look like a strong, active baby. Low muscle tone can look like a calm, sleepy baby. Asymmetric movement may not be obvious until the baby starts reaching for objects. This is why CP is historically not diagnosed until 12 to 24 months, though research now shows it can be identified much earlier with the right tools.

New early detection tools, including the General Movements Assessment (GMA) and the Hammersmith Infant Neurological Examination (HINE), are changing this timeline. When combined with brain MRI, these assessments can identify babies at high risk for CP before 6 months of age. If your baby was in the NICU, had HIE, or had abnormal brain imaging, ask your pediatrician about early assessment specifically for CP.

Red Flag Movements by Age

Cerebral palsy signs evolve as your baby grows and is expected to reach new motor milestones. Here is what to watch for at each stage.

2 Months

At this age, babies should be developing what neurologists call “fidgety movements,” small, circular movements of the limbs, trunk, and head that appear spontaneous and varied. The absence of these fidgety movements is one of the strongest early predictors of cerebral palsy. You may also notice that your baby has difficulty lifting their head during tummy time, feels unusually stiff or unusually floppy when held, or does not track your face with their eyes.

4 Months

By 4 months, babies should be bringing their hands together at midline, beginning to reach for objects, holding their head steady when supported in a sitting position, and pushing up on their forearms during tummy time. Red flags at this age include persistent fisting of one or both hands, inability to bring hands to midline, significant head lag when pulled to a sitting position, and back arching when held or during feeding.

6 Months

At 6 months, most babies can sit with support, roll from back to tummy, reach for and grasp objects with both hands, and bear some weight on their legs when held upright. Warning signs include inability to sit even with support, reaching with only one hand while the other stays fisted or tucked, not rolling in either direction, and stiff or scissoring legs when held upright.

9 Months

By 9 months, babies typically sit independently, crawl or scoot, transfer objects between hands, and pull to stand with support. Red flags include inability to sit independently, asymmetric crawling where one side of the body does most of the work, not bearing weight on legs, and persistent toe-pointing when held in a standing position.

12 Months

At one year, most babies are pulling to stand, cruising along furniture, possibly taking first steps, and using a pincer grasp. Significant red flags at 12 months include not pulling to stand, bottom-shuffling instead of crawling (when combined with other signs), strong hand preference before 12 months, and any regression of previously achieved skills.

The Fisted Hand Sign

One of the most commonly searched early signs of cerebral palsy is persistent hand fisting. Newborns naturally keep their hands clenched, and this is completely normal in the first 2 to 3 months. But by 3 to 4 months, babies should be opening their hands regularly, bringing them together, and beginning to reach for objects.

If your baby’s hands remain tightly fisted beyond 4 months, especially if the thumb is tucked inside the fingers (called a cortical thumb), this can be a sign of increased muscle tone in the hand and forearm. It is particularly significant if only one hand stays fisted while the other opens normally, as this asymmetry suggests one side of the brain may be affected.

Not every baby who fists their hands late has cerebral palsy. But persistent fisting, especially when combined with other signs like stiffness, asymmetric movement, or delayed milestones, is a reason to ask your pediatrician for a neurological evaluation.

Asymmetric Movement Patterns

Healthy babies move symmetrically. Both arms kick with similar energy. Both hands reach for toys. Both legs push against surfaces with comparable strength. When one side of the body consistently moves differently from the other, it can indicate that one hemisphere of the brain has been injured.

Asymmetry to watch for includes one hand reaching while the other stays at the baby’s side or stays fisted, turning the head to one side much more often than the other, rolling in only one direction, crawling with one arm or leg doing most of the work, and strong hand preference before 12 months. In typically developing children, a true hand preference does not emerge until 18 to 24 months. A baby who consistently uses one hand before their first birthday may have weakness or increased tone on the opposite side.

Stiff or Floppy Muscle Tone

Muscle tone is not the same as muscle strength. Tone refers to the resting tension in a muscle and how it responds to passive movement. Abnormal tone is one of the hallmark features of cerebral palsy and can present in two ways.

Hypertonia (high tone / stiffness). A baby with high tone may feel stiff or rigid when you pick them up. Their legs may scissor or cross when held upright. They may arch their back frequently. Their arms may be difficult to move into certain positions, such as extending at the elbow or opening the hand. When you try to move their limbs, you feel resistance, like bending a stiff hose.

Hypotonia (low tone / floppiness). A baby with low tone feels floppy, like a rag doll. They may have significant head lag when pulled to sitting. They may slip through your hands when held under the arms. They may drape over your arm during tummy time rather than lifting their head and chest. Feeding is often difficult because the muscles of the mouth and jaw lack the tone needed for effective sucking and swallowing.

Some babies have a combination of both, with high tone in some muscle groups and low tone in others. Tone can also change over time. A baby who starts with low tone may develop increased tone as they grow.

Delayed Head Control

Head control is one of the first major motor milestones, and delays in achieving it are among the earliest observable signs of cerebral palsy. By 2 months, babies should be lifting their head briefly during tummy time. By 4 months, they should hold their head steady when supported in a sitting position with minimal wobble. By 6 months, head control should be well established.

A simple test you can do at home: gently pull your baby from lying on their back to a sitting position while holding their hands. A baby with good head control will keep their head in line with their body. A baby with poor head control will show significant head lag, with the head falling backward as the body comes up. Persistent head lag beyond 4 months is a reason to discuss your concerns with your pediatrician.

Feeding and Swallowing Difficulties as Early Signs

Feeding is one of the most complex motor tasks a newborn performs, requiring coordination of over 30 muscles in the mouth, throat, and chest. Because of this complexity, feeding difficulties are often one of the earliest functional signs of cerebral palsy.

Signs to watch for include difficulty latching or maintaining a latch during breastfeeding, weak or ineffective sucking, frequent gagging or choking during feeds, milk leaking from the corners of the mouth, feeding that takes much longer than expected (more than 30 to 40 minutes), poor weight gain despite adequate feeding opportunities, and excessive drooling beyond what is typical for the baby’s age.

If your baby is struggling to feed, ask for a referral to a feeding specialist (speech-language pathologist or occupational therapist who specializes in infant feeding). Feeding problems do not always mean CP, but when they occur alongside other signs like abnormal tone or movement asymmetry, they add to the clinical picture.

When to Ask Your Pediatrician

You do not need to wait for a well-child visit to bring up developmental concerns. If you are noticing any of the signs described in this guide, call your pediatrician and request an appointment focused specifically on your baby’s motor development. Be direct about what you are observing.

Situations that warrant an immediate conversation include your baby consistently favoring one side of the body, persistent hand fisting beyond 3 to 4 months, not meeting expected motor milestones (head control by 4 months, sitting with support by 6 months, sitting independently by 9 months), abnormal muscle tone that you can feel when handling your baby, feeding difficulties that are not improving, and any loss of previously achieved skills.

If your baby had a high-risk birth, including HIE, prematurity, neonatal seizures, or abnormal brain imaging, ask your pediatrician about referral to a developmental follow-up program. Many NICU graduates are eligible for enhanced developmental monitoring, but it does not always happen automatically. Advocate for your child.

What a Developmental Evaluation Involves

If you are referred for a developmental evaluation, knowing what to expect can help reduce anxiety. The evaluation is not painful for your baby and typically involves several components.

Detailed history. The specialist will ask about the pregnancy, labor and delivery, any NICU time, and your baby’s development since birth. Bring any medical records you have, especially brain imaging reports and discharge summaries.

Neurological examination. The doctor will assess your baby’s muscle tone, reflexes, posture, and movement patterns. They will observe spontaneous movement, check how your baby responds to being positioned in different ways, and assess symmetry.

Standardized assessments. Depending on your baby’s age, the specialist may use the HINE (Hammersmith Infant Neurological Examination), the GMA (General Movements Assessment), or the AIMS (Alberta Infant Motor Scale). These are validated tools that compare your baby’s movement and neurological responses to established norms.

Brain imaging. If not already done, the specialist may order an MRI to look for patterns of brain injury associated with cerebral palsy. The MRI findings help confirm the diagnosis and provide information about the likely type and severity of CP. An MRI for a baby typically requires sedation, and your medical team will explain the process and risks.

After the evaluation, the specialist will share their findings with you. They may give a definitive diagnosis, a working diagnosis of “suspected cerebral palsy,” or a recommendation for monitoring and follow-up. Regardless of the label, if there are concerns, your baby should be referred to early intervention services immediately. You do not need a confirmed diagnosis to start therapy, and you should not wait for one.

The signs in this guide are here to help you look with informed eyes, not to replace a professional evaluation. If you recognize your baby in any of these descriptions, take the next step. Ask for the referral. Schedule the evaluation. Start the conversation. The earlier you act, the more you are giving your child’s developing brain to work with. And that is a gift that matters more than almost anything else you can do.