| 002632-M | Role of Theta Frequency Oscillations in Proactive and Reactive Control Processes in Youth with Attention Deficit Hyperactivity Disorder (ADHD) and Obsessive Compulsive Disorder (OCD) | Recruitment has not started | 10-17 Years | NIMH | obsessive | 20-HG-0147 | An Observational Study of the Developing Brain, Impulsivity and Compulsivity | Participants currently recruited/enrolled | 6-80 Years | NIMH | obsessive | 89-M-0006 | Brain Imaging of Childhood Onset Psychiatric Disorders, Endocrine Disorders and Healthy Volunteers | No longer recruiting/follow-up only | 3-120 Years | NIMH | obsessive |