Brain pacemaker tweak may ease Parkinson's without fogging thinking

This study tests a new way to use deep brain stimulation (DBS) for Parkinson's disease. Standard DBS helps movement but can sometimes cause thinking or mood problems. The researchers will add low-frequency stimulation to a different part of the brain while keeping the usual high-frequency stimulation. Ten adults with Parkinson's who already have a DBS system will take part. The goal is to see if this dual approach is safe, tolerable, and better at preserving thinking and mood while still controlling movement symptoms.