(IMAGE) McGill University Health Centre Caption Image 1: MRI of the brain of a healthy child: gray matter is pale gray and white matter is dark gray. Image 2: MRI of the brain of a child with cerebral palsy: red arrows show scarring over the central gray matter leading to stiffness and problems in the coordination of movements. Credit McGill University Health Centre Usage Restrictions credit the MUHC License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.