Cerebral palsy is a group of conditions that affect movement and posture. It's caused by damage that occurs to the developing brain, most often before birth.
Symptoms appear during infancy or preschool years and vary from very mild to serious Children with cerebral palsy may have exaggerated reflexes. The arms, legs and trunk may appear floppy. Or they may have stiff muscles, known as spasticity. Symptoms also can include irregular posture, movements that can't be controlled, a walk that's not steady or some combination of these.