Cerebral palsy (CP) is a group of disorders that affect a person’s ability to move and maintain balance and posture. CP is the most common motor disability in childhood. Cerebral means having to do with the brain. Palsy means weakness or
problems with using the muscles. 
The signs of CP vary greatly because there are many different types and levels of disability. The main sign that a child might have CP is a delay in reaching motor or movement milestones (such as rolling over, sitting, standing, or walking).