Patient description: A 57-year old farmer was diagnosed with Parkinson's disease a year ago. He experiences slowness of movement and tremors. His past medical history is significant for hypertension and hypercholesterolemia. He lives with his wife. They have three children. He used to be active with planting and taking care of their farm animals before his diagnosis. The patient complains of shaking and slow movement. He had difficulty entering through a door, as he was frozen and needed guidance to step in. His handwriting is getting smaller. He is on Levodopa and Trihexyphenidyl. He stated his medications help with shaking and slow movement. But he still has difficulty initiating movements, stiffness and slowness in general. He is an alert and cooperative man who doesn't have any signs of dementia. He doesn't smoke or use any illicit drugs.

Clinical trial eligibility criteria: eligible ages (years): 18.0-75.0,  Parkinson Disease Ability to give informed consent for the study Movement disorder symptoms that are sufficiently severe, in spite of best medical therapy, to warrant surgical implantation of deep brain stimulators according to standard clinical Patient has requested surgical intervention with deep brain stimulation for their disorder No movement -elated abnormalities that suggest an alternative diagnosis or contraindicate surgery Absence of significant cognitive impairment (score of 21 or greater on the Montreal Cognitive Assessment (MoCA) Signed informed consent Ability to comply with study follow-up visits for brain recording, testing of adaptive stimulation, and clinical assessment Age 21-75 Diagnosis of idiopathic PD with duration of motor symptoms for 3 years or greater Patient has undergone appropriate therapy with oral medications with inadequate relief as determined by a movement disorders neurologist  Coagulopathy, anticoagulant medications, uncontrolled hypertension, history of seizures, heart disease, or other medical conditions considered to place the patient at elevated risk for surgical complications Evidence of a psychogenic movement disorder: Motor symptoms that remit with suggestion or "while unobserved", symptoms that are inconsistent over time or incongruent with clinical condition, plus other manifestation such as "false" signs, multiple somatizations, or obvious psychiatric disturbance Pregnancy: all women of child bearing potential will have a negative urine pregnancy test prior to undergoing their surgical procedure Significant untreated depression (BDI-II score >20). History of suicidal attempt or active suicidal ideation (Yes to #2-5 on C-SSRS) Any personality or mood symptoms that study personnel believe will interfere with study requirements Subjects who require electroconvulsive therapy (ECT), repetitive transcranial magnetic stimulation (rTMS) or diathermy Implanted stimulation systems such as; cochlear implant, pacemaker, defibrillator, or neurostimulator Previous cranial surgery Drug or alcohol abuse Meets for Parkinson's disease with mild cognitive impairment (PD-MCI). These are: performance of more than two standard deviations below appropriate norms, for tests from two or more of these five cognitive domains: attention, executive function, language, memory, and visuospatial tests