The purpose of this study is to examine brain activity related to Attention Deficit Hyperactivity Disorder (ADHD), and to understand how individual hereditary factors can influence human behavior and brain activities after. The study will use an investigational technology to measure differences between the brains of 20 individuals diagnosed with ADHD and 20 individuals whom do not experience symptoms that relate with ADHD. The new technology for non-invasively examining the brain is called Transcranial Magnetic Stimulation (TMS). Along with the TMS a genetic sample will be obtained through the method of a blood draw to observe the differences in peoples DNA who experience symptoms of ADHD to people that do not. Compensation for time and travel is provided for completion of the visit.