Additional Study Information: Pain is a pervasive problem for persons with Cerebral Palsy (CP). The level to which many people with CP suffer from pain is mostly unknown and oftentimes difficult to determine. People with CP who are nonverbal or are unable to communicate cannot report their pain to their doctors or caregivers. We are doing this research study to better understand if the body's response to pain changes in relation to how a person experiences pain and to investigate differences between how people with CP experience pain as compared to the general population and to determine if there is a way we can measure pain through a blood test. Your participation in this study will be invaluable to helping improve the lives of people with CP. You may receive compensation up to $25 in the form of a pay card for participating in this study.