If you’re noticing something different about your child’s development, movement, behavior, or learning, you’re right to pay attention. Neurological disorders in children are more common than most parents realize. In 2021, almost 11% of children ages 5 to 17 had been diagnosed with ADHD alone, about 8% had a learning disability, and 3.1% had autism. Many children have more than one condition. The signs can be subtle, especially in younger children, and they vary widely depending on the type of disorder and your child’s age.
This isn’t a diagnosis tool, but it can help you understand what to watch for, how the evaluation process works, and what steps to take next.
Signs That Vary by Age
What counts as a red flag depends entirely on how old your child is. A behavior that’s perfectly normal at 18 months could signal a problem at age 4. The CDC publishes developmental milestones for ages 2 months through 5 years, covering how children play, learn, speak, behave, and move. The American Academy of Pediatrics recommends formal developmental screening at 9, 18, and 30 months, plus specific autism screening at 18 and 24 months.
In babies under 6 months, watch for a body that feels unusually stiff or unusually floppy when you pick them up. Infants with early motor problems may stiffen their legs or cross them when lifted, or constantly push away from you by arching their back and neck. Primitive reflexes (the startle reflex, for example) should disappear by around 6 months. If they persist, that can indicate a neurological issue.
By 6 months, babies should be able to sit with support, laugh, and show interest in objects and people. By 9 months, they should roll both ways, sit well on their own, and use their fingers to pick up small objects. Missing these milestones doesn’t automatically mean something is wrong, but consistent delays across several areas are worth investigating.
In toddlers (ages 1 to 3), temper tantrums and aggression are normal parts of development. They peak around age 3. The concern arises when a child also has very limited speech, doesn’t respond to their name, avoids eye contact, shows no interest in other children, or has unusual repetitive movements. These patterns can point toward autism or other developmental conditions.
In school-age children, the signs often shift toward learning, attention, and social difficulties. A child who can’t sit still, constantly loses things, struggles to follow multi-step instructions, or has trouble reading despite adequate effort may be showing signs of ADHD or a learning disability.
Motor Problems and Cerebral Palsy
Cerebral palsy is one of the most common neurological disorders affecting movement in children. It results from events in the early years of life that affect brain development, and the signs often appear before a child’s first birthday. The earliest clue is abnormal muscle tone: a baby’s body parts feel either too floppy or too stiff. Some infants have both, with floppiness in the trunk and stiffness in the limbs.
Other early signs include difficulty bringing hands together at the midline by 4 months, not pulling to sit by 6 months, or strongly favoring one hand before age 1 (most children don’t develop hand preference until 18 months or later). If your baby seems to be meeting some milestones on one side of the body but not the other, that asymmetry is worth mentioning to your pediatrician.
Seizures Can Look Different Than You Expect
When most people think of seizures, they picture a child falling and shaking. That does happen (tonic-clonic seizures cause body stiffening followed by rhythmic jerking of the arms and legs, with loss of consciousness), but many childhood seizures look nothing like that.
Absence seizures are especially easy to miss. A child may appear to stare into space for a few seconds, sometimes with slight eye blinking or purposeless hand movements, then snap back as if nothing happened. Teachers often mistake these for daydreaming. Childhood absence epilepsy tends to run in families and usually stops by puberty, but it can significantly affect learning if unrecognized.
In babies under 6 months, infantile spasms are a specific type of seizure to watch for. The infant may suddenly drop their head, bend at the waist, jerk their arms upward, or cry out. These episodes often cluster together and can happen dozens of times a day. Infantile spasms require prompt evaluation because early treatment leads to better outcomes.
Other seizure types in children include myoclonic seizures (quick jerks of the arms or upper body), atonic seizures (sudden loss of muscle tone causing the child to drop or fall), and tonic seizures (sudden stiffening, often during sleep).
ADHD, Autism, and Overlap
ADHD is the most common behavioral disorder of childhood, affecting roughly 11% of school-age children. Autism affects about 3%. What surprises many parents is how frequently these two conditions occur together: 50 to 70% of children with autism also meet criteria for ADHD.
The overlap makes sense when you look at the brain. Both conditions involve differences in how the brain allocates attention, monitors its own performance, and processes sensory information. Children with either condition often show slower and more variable reaction times on tasks requiring focus and impulse control. Executive functioning challenges, like trouble switching between tasks, planning ahead, or stopping an action already in progress, appear in both groups.
This overlap also means that a child initially diagnosed with one condition may later be recognized as having the other as well. A child diagnosed with ADHD at age 6 might show social communication difficulties that become clearer by age 8 or 9. Or a child diagnosed with autism early on might have attention and impulsivity problems that become more apparent once school demands increase. If your child has one diagnosis but you’re still seeing unexplained struggles, it’s reasonable to ask about reevaluation.
Headaches and Sleep Problems
Not every neurological concern involves development or behavior. About 5% of children experience migraines by age 15, and two out of three children under 10 have some type of sleep problem. Both can be neurological in origin.
Childhood migraines often look different from adult migraines. They tend to be shorter, sometimes lasting only an hour, and the pain may affect the entire head rather than one side. Nausea, vomiting, and sensitivity to light are common. Some children get abdominal migraines, where the main symptom is stomach pain rather than a headache.
Sleep disorders in children range from common issues like sleepwalking and night terrors to conditions like narcolepsy or sleep apnea. Persistent, severe sleep disruption that doesn’t improve with consistent routines can warrant a neurological evaluation, especially if your child also has daytime symptoms like excessive sleepiness, difficulty concentrating, or behavioral problems.
How the Evaluation Works
If your pediatrician shares your concern, they’ll likely refer you to one of two specialists. A pediatric neurologist focuses on the brain and nervous system, handling conditions like epilepsy, cerebral palsy, and headache disorders. A developmental pediatrician specializes in developmental and behavioral conditions like autism, ADHD, and learning disabilities. Some children see both.
The evaluation itself depends on what your child’s symptoms suggest. An EEG (a painless test where sensors are placed on the scalp) measures electrical activity in the brain and is the primary tool for diagnosing seizure disorders. An MRI uses magnetic fields to create detailed images of the brain and spinal cord, helping identify structural abnormalities, tumors, or signs of injury. Genetic testing, done through a blood draw or saliva sample, can identify inherited conditions. Some panels are designed for specific symptom clusters, like infant-onset epilepsy.
For developmental and behavioral concerns, the evaluation is less about imaging and more about structured observation and testing. A neuropsychologist may assess your child’s cognitive abilities, language, memory, attention, and social skills through a series of age-appropriate tasks and questionnaires.
What to Bring to the Appointment
The single most useful thing you can bring is video. If your child does something that concerns you, whether it’s an unusual movement, a staring spell, a meltdown, or a way of walking, record it on your phone. These episodes don’t always happen on command in a doctor’s office, and a 30-second video can be more informative than a 10-minute verbal description.
Beyond video, keep a simple log of what you’re seeing: when it happens, how long it lasts, what your child was doing before and after, and how often it occurs. Bring your child’s medical history, including birth details (premature birth, complications during delivery, NICU stay), any previous evaluations, family history of neurological or developmental conditions, and a list of your child’s current medications. Write down your specific questions beforehand so you don’t forget them in the moment.
Trusting Your Instincts
Parents notice things that screening tools miss. You see your child every day in a way no clinician can replicate in a 20-minute visit. If something feels off, the fact that you can’t quite articulate it doesn’t make it less valid. Developmental screening is recommended at specific ages, but the AAP also recommends screening “whenever a parent or provider has a concern.” Your concern counts as a reason to evaluate.
Many neurological and developmental conditions in children respond well to early intervention. Speech therapy, occupational therapy, behavioral support, medication when appropriate, and educational accommodations can dramatically change a child’s trajectory. The goal of evaluation isn’t to label your child. It’s to understand how their brain works so you can give them the right support.