Neurophysiology of Locomotor Adaptation and Freezing of Gait in Parkinson's Disease

Inclusion Criteria

• •consensus diagnosis of idiopathic PD by fellowship trained movement disorders neurologists at the Normal Fixel Institute of Neurological Diseases;
• •chronically stable DBS, defined as having had DBS for at least 6 months in duration with optimized DBS settings;
• •Age between 18 - 80 years old per the FDA data sheet for PD DBS;
• •no dementia according to the clinical diagnostic criteria for PD dementia;
• •ambulatory without the use of walking aids, or another person's assistance.