Cerebral palsy, caused by brain damage, is a significant cause of life-long disability and currently affects 1 in 400 children. The purpose of this project is to study how the brain develops its control of movement in normal babies, and also in children who have suffered a stroke as babies or in later childhood. The research should provide new insights into how the brain develops, and demonstrate whether, in some children, the brain can reorganise itself to overcome damage. It is hoped that this will lead to new treatments to reduce the number of children who suffer from cerebral palsy.