Characterizing the Pathophysiological Role of the Pallido-thalamocortical Motor Pathway in Parkinson's Disease.

"* Standard of care DBS surgery~* stimulation through the DBS lead during their DBS lead surgery, the study team will use 2 sets of stimulation settings on each participant:~ 1. Stimulation through the DBS contact whose electrical activity is the MOST similar to the area of the brain that controls movement~ 2. Stimulation through the DBS contact whose electrical activity is the LEAST similar to the area of the brain that controls movement"