Sensing in Sleep Deep Brain Stimulation

Inclusion Criteria: 1. Ability of subject to understand and the willingness to sign a written informed consent document. 2. Males and females; Age 40-80 3. Subjects with the diagnosis of idiopathic PD consistent with the United Kingdom Parkinson Disease society brain bank criteria, or documented diagnosis of Parkinson Disease who have a Deep Brain Implant, Percept RC device to subthalamic nucleus (STN) or Globus pallidus internus (GPi). 4. Willingness to adhere to the PSG regimen and turn DBS off for one night. 5. A score of ≥23 on the Montreal Cognitive Assessment (MoCA) 6. Be willing to stop any sleep hypnotics such as benzodiazepines and Ambien, with a 3 day washout period. Exclusion Criteria: 1. History of severe cardiovascular disease, untreated obstructive sleep apnea (OSA). 2. History of other neurological disorders affecting the central nervous system such as stroke, multiple sclerosis, tumors, amyotrophic lateral sclerosis or muscle disease such as muscular dystrophy, myopathy. 3. History of Dementia. 4. Report dopaminergic medication changes in the past month.