The Four Types of Cerebral Palsy: Spastic, Dyskinetic, Ataxic, Mixed
Cerebral palsy gets talked about as if it’s one thing. It genuinely isn’t. Four distinct types exist, caused by damage to different parts of the brain, looking and behaving in real, meaningfully different ways. Knowing which one your own child has changes what you should read next, who you should ask, and what treatment conversations actually apply.
The four types, at a glance
Spastic — tight, stiff muscles
Damage to the pathway carrying signals from the brain’s motor cortex. Muscle tone is consistently increased.
Dyskinetic — involuntary movement
Damage to the basal ganglia. Movements fluctuate, worsen with stress, and disappear during sleep.
Ataxic — balance and coordination
Damage to the cerebellum. Tone is often decreased, with tremor that worsens toward the end of a movement.
Mixed — more than one at once
Most often spastic and dyskinetic together, reflecting a broader pattern of brain injury.
Spastic CP: tightness
By far the most common type, resulting from damage to the pathway carrying movement signals from the brain to the spinal cord. Muscle tone stays consistently increased, and resistance to movement is strongest when a limb is moved quickly. Spastic CP breaks down further into hemiplegia, diplegia, and quadriplegia, depending on which parts of the body are affected.
Because this is the most common type by a wide margin, and involves genuinely distinct mechanics from the other three, it has its own dedicated, in-depth explanation.
Read the full guide to spastic CP →Dyskinetic CP: involuntary movement
The second most common type, resulting from damage to the basal ganglia, a deep brain structure that normally coordinates smooth, purposeful movement. Unlike spastic CP’s consistent tightness, dyskinetic CP involves fluctuating tone, sometimes too tense, sometimes too loose, alongside genuinely involuntary movement.
Athetoid
Slow, writhing, continuous movements, most visible in the hands, arms, and face.
Choreiform (chorea)
Rapid, irregular, jerky movements, often affecting the extremities.
Dystonic
Sustained, abnormal postures caused by opposing muscles contracting at the same time.
Movements intensify with stress, excitement, or effort, and disappear almost completely during sleep.
Speech is frequently and often significantly affected, since dyskinetic CP commonly involves the face and mouth muscles, causing dysarthria.
Many children with dyskinetic CP have genuinely preserved cognitive function, meaning they understand and think at a level their bodies simply can’t always outwardly express. This is exactly why augmentative and alternative communication tools matter so much for this group, giving a real, reliable way to express a mind that’s fully present, even when speech itself is difficult.
A classic, well documented cause is kernicterus, brain damage from severe, untreated newborn jaundice, which specifically targets the basal ganglia.
Ataxic CP: balance and coordination
The least common of the four, resulting from damage to the cerebellum, the brain region responsible for coordinating balance and fine-tuning movement. Muscle tone is often decreased rather than increased, and the defining challenge is coordination itself, not strength or tightness.
Intention tremor: a shake that gets noticeably worse the closer a hand gets to completing a precise task, like reaching for an object or writing.
- A wide-based, unsteady walking pattern, feet spread further apart than typical for extra balance
- Genuine difficulty with fine, precise movements such as writing or tying shoelaces
- Coordination challenges affecting the arms, legs, and trunk together
Causes differ somewhat from the other types too; ataxic CP is often linked to unknown causes, and sometimes to genetic cerebellar conditions specifically, rather than the perinatal events more commonly associated with spastic or dyskinetic CP.
Mixed CP: more than one at once
Mixed CP describes a genuinely common presentation, not a rare edge case, where a child shows real features of more than one type together. The most frequent combination is spasticity alongside dyskinetic movement, reflecting a pattern of brain injury broad enough to affect more than one region at once. If your child’s presentation doesn’t fit neatly into a single category, this is often exactly why.
Why the specific type actually matters
Treatment approaches genuinely differ by type, not just in degree but in kind. Spasticity-focused treatments are built specifically for the consistent tightness of spastic CP and generally aren’t the right tool for dyskinetic CP’s fluctuating tone. Knowing your child’s specific type also changes what you should be searching for and reading; a resource written generically about “cerebral palsy” without distinguishing types often ends up not quite fitting your family’s actual situation.
Want help understanding your child’s specific type and what it means for treatment?
Request a free remote evaluation →Frequently asked questions
What are the four main types of cerebral palsy?
Spastic (muscle tightness, most common), dyskinetic (involuntary movement, second most common), ataxic (balance and coordination difficulty, least common), and mixed (combining features of more than one, most often spastic with dyskinetic).
What’s the clearest way to tell spastic and dyskinetic apart?
Spastic involves consistently increased tone, present most of the time. Dyskinetic involves fluctuating tone plus involuntary movement that increases with stress and disappears during sleep, one of the clearest distinguishing signs.
Does dyskinetic CP mean intellectual disability too?
Not necessarily. Many children with dyskinetic CP have genuinely preserved cognitive function that their bodies simply can’t always express outwardly, which is why AAC tools matter so much for this group specifically.
What is the hallmark sign of ataxic CP?
Intention tremor, a shake that worsens the closer a hand gets to completing a precise task, tied directly to voluntary movement and reflecting the cerebellum’s normal coordination role.
Is mixed CP rare?
No, genuinely common. Most often spasticity combined with dyskinetic movement, reflecting brain injury broad enough to affect more than one region.
Why does the specific type matter?
Treatment approaches, research literature, and relevant specialists genuinely differ by type. Spasticity-focused treatments suit spastic CP specifically and aren’t the right fit for dyskinetic CP’s fluctuating tone, so knowing your child’s type helps you find genuinely relevant information.
References
- “Cerebral Palsy (CP).” Merck Manual Professional Edition. Merck Manual ↗
- “Dyskinetic cerebral palsy.” Wikipedia. Wikipedia ↗
- “Ataxic cerebral palsy.” Wikipedia. Wikipedia ↗
- “Types of Cerebral Palsy: Spastic, Dyskinetic, and Ataxic Explained.” CP Family Help. CP Family Help ↗
- “Dyskinetic Athetoid Cerebral Palsy.” Cerebral Palsy Guidance. Cerebral Palsy Guidance ↗