This study is exploring how Deep Brain Stimulation (DBS) helps people with Parkinson's disease during sleep. DBS is a treatment where a device sends electrical signals to the brain to help with movement problems. The study is focusing on a new type of DBS called adaptive DBS (aDBS) which adjusts the signals based on brain activity. The study aims to understand how different amounts of stimulation affect sleep quality and brain activity. Sleep is important for people with Parkinson's because it affects how they feel during the day. The researchers want to make sure the DBS helps with sleep without causing problems. They will test different levels of brain stimulation while participants sleep to find the best settings.

• The study requires participants to have a DBS system already in place for at least three months.
• Participants must be 18 years or older and able to move on their own.
• Individuals with other neurological diseases or severe sleep disorders cannot join the study.