Types of Cerebral Palsy and Classification

Clinical Types

Cerebral palsy is divided into four main types. The spastic type is the most common (70–80%); it's characterized by stiffness in the muscles, limited movement in the joints, and a scissor-like walking pattern. The dyskinetic type involves involuntary movements (dystonia, athetosis) and usually appears after severe oxygen deprivation or kernicterus; in these children, cognitive function is often relatively preserved. The ataxic type shows up with problems of balance and coordination; in this type, ruling out progressive genetic or metabolic diseases is especially important. The mixed type describes situations where more than one pattern is present together.

The spastic type is divided into subgroups according to its distribution in the body: diplegia (the legs), hemiplegia (one side), quadriplegia (all four limbs). This distinction is important because it guides both the problems that may accompany it and the expected functional level.

In some children, the boundaries between types may not be clear-cut; for example, both spasticity and mild dystonia findings can be present together. In such situations, your doctor may classify based on the "dominant type" and update this classification over time as the clinical picture becomes clearer.

In hemiplegic children, the upper limb is usually more prominently affected than the lower limb; this is one reason most hemiplegic children gain the ability to walk independently but need more support with fine motor skills.

Functional Classification Systems: GMFCS, MACS, CFCS, EDACS

The Gross Motor Function Classification System (GMFCS) describes a child's sitting, walking, and mobility ability across 5 levels: at Level I the child walks without limitation; at Level II they walk but have difficulty on uneven ground; at Level III they walk with a hand-held device; at Level IV they get around on their own in a limited way; at Level V independent mobility is severely limited.

An important feature of the GMFCS is that the level stays largely stable over time; for this reason it carries strong prognostic value. That said, this classification is a starting point, not a "ceiling."

The Manual Ability Classification System (MACS), the Communication Function Classification System (CFCS), and the Eating and Drinking Ability Classification System (EDACS) describe hand use, communication, and feeding safety, respectively, with similar 5-level systems. When these systems are used together, a many-sided, rich profile of your child is formed.

Another valuable aspect of these classification systems is that they're used in research; when the effectiveness of a treatment method is assessed, it's usually stated that the study was done in children at a certain GMFCS or MACS level. For this reason, when applying a research finding to your own child, it's helpful to pay attention to whether the classification level of the children in the study is similar to your child's.

The GMFCS level is determined not by a single momentary observation but based on your child's overall, consistent performance in daily life; it reflects their typical, everyday performance, not their highest performance "on a good day." This distinction keeps the classification realistic and consistent.

Reassessing the Classification Over Time

The GMFCS, MACS, CFCS, and EDACS levels can change as development continues, especially in the child's first few years; for this reason, it's recommended that these classifications be reassessed at regular intervals (for example, once a year). After age 4, the GMFCS level usually becomes more stable. Knowing how these classifications change over time provides a common, consistent reference point both in treatment planning and in communication with the family.

Using the Classification in Daily Life

Using the GMFCS, MACS, and other classifications as a common language not only with your doctor but also with your therapists and your school provides consistent, quick sharing of information about your child among different institutions. For example, when starting at a new school or with a new therapist, sharing these levels creates a quick and accurate starting point instead of long explanations.

Seeing the Child Beyond the Labels

Classification systems are extremely valuable tools for clinical communication; but in daily life it's important not to see your child only as a "GMFCS III" or "spastic diplegia." These labels are tools that help plan your child's care; they are not the definition of who they are.

The Use of Classification in Different Countries

Classification systems such as GMFCS, MACS, CFCS, and EDACS are tools that have been accepted as standard worldwide and translated into many languages; this means that information about your child can be passed on consistently even among specialists in different countries. If you're considering an assessment or treatment abroad, having this classification information with you makes communication easier.

The Clinical Type Can Become Clearer Over Time

Especially in very young babies, the exact clinical type of cerebral palsy (spastic, dyskinetic, ataxic) may not be clear in the first months; muscle tone and movement patterns become clearer with age. For this reason, it's normal for a "type" diagnosis made at a very young age to be updated over time.