Concurrent tDCS for Chronic Pain in Adults With Cerebral Palsy

Inclusion Criteria: * 18 years or older * Diagnosis of Cerebral Palsy * Chronic pain associated with movement * Own legal decision maker * Current level of at least moderate pain (\>=4 out of 10, as assessed by the average pain Eligibility text messages) * Eligible for MRI without sedation * Has a cellular device that can receive and respond to study text messages * Has stable doses of prescription medications for at least 1 month prior to study participation and no anticipated change in medication plan during the participation. Exclusion Criteria: * Non-English speaking * Non-verbal * Implanted medical devices * Any metal in the head * Has had unexplained episodes of loss of consciousness * Diagnosis of epilepsy or history of seizures * Diagnosis of bipolar disorder, schizophrenia, or autism spectrum disorder * Damage of skin at sites of stimulation * Currently suffering from severe or frequent headaches * Has had a traumatic brain injury * Any serious life-threatening disease such as congestive heart failure, pulmonary obstructive chronic disease or active neoplasia * Pregnant * Have previously used tDCS or TMS and had an adverse reaction * Diagnosis of severe substance or alcohol use disorder within 3 months of enrollment