Cerebral palsy is a condition that affects a person's ability to move and to maintain balance and posture. It is caused by damage to the brain that occurs before, during, or shortly after birth. Cerebral palsy can range from mild to severe, and it can affect one or more limbs. People with cerebral palsy may also have problems with speech, hearing, and vision. There is no cure for cerebral palsy, but there are treatments that can help people with the condition to improve their ability to function.