Decoding the Neural Mechanisms Underlying Postural Instability and Gait Dysfunction in Parkinson's Disease

Inclusion Criteria:

* You have been diagnosed with Parkinson's disease
* You already have a deep brain stimulation (DBS) device implanted as part of your medical care - specifically, the Medtronic Percept DBS device
* Your DBS settings have been stable for at least 3 months
* You experience freezing of gait (sudden inability to move your feet when trying to walk)
* You are able to walk on your own for at least 10 minutes without assistance
* You are willing to temporarily stop your Parkinson's medications and have your DBS settings adjusted for study testing
* You are able to understand the study and provide consent to participate

Exclusion Criteria:

* You have a neurological condition other than Parkinson's disease (such as stroke or multiple sclerosis)
* You have been diagnosed with dementia or have difficulty understanding the study or giving consent
* You currently have alcohol or substance abuse problems
* You have hearing or vision problems that would make it difficult to use a virtual reality headset
* You have any medical or mental health condition that, in the opinion of the study doctor, would make it unsafe or difficult for you to participate