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): 50.0-75.0,  Parkinson's Disease Patients must have a clinical diagnosis of probable idiopathic PD. The diagnosis will be based upon the presence of at least three of four clinical features according to diagnostic utility (Resting Tremor, Bradykinesia, Rigidity, Asymmetric Onset) and an absence of clinical features suggestive of an alternative diagnosis. 2. Demonstrated response to dopaminergic therapy. In order to patients with a possible alternative diagnosis, all subjects included in the study must have demonstrated a good response to DA drugs, defined as demonstrating at least 30% improvement in parkinsonian motor signs, based upon the UPDRS motor examination subscore, following the administration of their DA drug(s) during the screening neurological examination. 3. Advanced Parkinson's disease. 4. No contraindications to surgery. 5. Age between 50 and 75 years old. 6. Available for follow-up for the entire duration of the study. 7. Informed Consent: The subject understands the risks, benefits, and alternatives to the study procedures and participation in the study. 8. MRI within normal range for age  Evidence of an alternative diagnosis or secondary parkinsonism, as suggested by features unusual early in the clinical course: Prominent postural instability, freezing phenomena, or hallucinations unrelated to medications in the first 3 years after symptom onset; dementia preceding motor symptoms; supranuclear gaze palsy (other than restriction of upward gaze) or slowing of vertical saccades in the first year; severe, symptomatic dysautonomia unrelated to medications; documentation of a condition known to produce parkinsonism and plausibly connected to the subject's symptoms (such as suitably located focal brain lesions or neuroleptic use within the past 6 months) 2. Uncontrolled medical condition or clinically significant medical disease that would increase the risk of developing pre or postoperative complications (e.g., significant cardiac or pulmonary disease, uncontrolled hypertension). 3. Evidence of dementia 4. Major psychiatric disorder 5. Previous brain operation or injury. 6. Active participation in another clinical trial for the treatment of PD. 7. Patients who have demand cardiac pacemakers or who have medical conditions that require repeat MRI scans