This study is about understanding balance problems in Veterans with Parkinson's Disease (PD). PD is a brain disorder that makes it hard to move, causing symptoms like slow movement, stiff muscles, shaking, and trouble standing still (postural instability). These balance issues often lead to falls, which can be dangerous. To study this, researchers will use small wearable sensors on Veterans with PD to track their movements at home. They will also use brain devices called deep brain stimulation (DBS) electrodes to measure brain signals. This will help them learn more about how the brain controls balance and possibly find new treatments.

• Participants will wear five sensors and a neck camera for one week.
• The study is for Veterans with PD in stages 2-3 who can give consent.
• Excludes those with severe dementia or other similar conditions.