Study to Characterize Acute and Chronic Directional Aspects of Deep Brain Stimulation

Exclusion Criteria

• •Any significant psychiatric problems, including unrelated clinically significant depression as determined by the investigator
• •Any current drug or alcohol abuse as determined by the investigator
• •Any history of recurrent or unprovoked seizures
• •Any significant medical condition that is likely to interfere with study procedures or likely to confound evaluation of study endpoints, including any terminal illness with survival \<12 months