Subthalamic Deep Brain Stimulation (DBS) in Parkinson's Disease

Participants sit in a chair that looks like one in a dentist's office. A magnetic coil will be placed on the scalp on one side of the head, overlying the brain's motor cortex to stimulate the brain's output to the muscles in the opposite hand. A second magnetic coil will be placed on the scalp of the opposite side. Recordings from both hands will be made using the magnetic coils placed on scalp. Results will be compared for participants with and without Parkinson's Disease.

Participants will be asked to move their upper and lower limbs while seated in a chair. Wireless EMG sensors placed on arm and leg muscles will record measurements during this procedure. Upper and lower limb testing will be performed separately.