Parkinson's disease can cause lasting changes in walking and mobility. Non-invasive brain imaging methods including Magnetic Resonance Imaging (MRI) have been useful tools to understand the brains contribution to disrupted gait. In this study we are evaluating how activity in the brain in Parkinson participants changes when they are engaged in a gait-like behavior in the MRI scanner. We are seeking to recruit 10 participants with a diagnosis of PD and 10 age matched healthy control participants without a diagnosis of PD to undergo an hour of MRI scanning and an hour of gait assessments.