Clinical Benefits of Reprogramming Chronic Subthalamic Stimulation in Parkinson's Disease

Area of Science:

• Neurology
• Neurosurgery
• Biomedical Engineering

Background:

• Deep brain stimulation (DBS) is a crucial therapy for Parkinson's disease (PD).
• Reprogramming of existing DBS settings is often underutilized despite potential benefits.
• Chronic subthalamic nucleus (STN) DBS requires periodic optimization for sustained efficacy.

Purpose of the Study:

• To evaluate the clinical impact of systematic reprogramming in patients with long-term STN DBS.
• To assess changes in motor function and medication requirements after reprogramming.
• To explore imaging correlates of effective STN DBS reprogramming.

Main Methods:

• Ten patients with long-term STN DBS underwent systematic reprogramming due to symptom recurrence.
• Movement Disorder Society-Unified Parkinson's Disease Rating Scale (MDS-UPDRS) Part III scores (medication off/DBS ON) were compared.
• Levodopa equivalent daily dose (LEDD) and imaging data were analyzed pre- and post-reprogramming.

Main Results:

• Reprogramming led to a significant 24% improvement in MDS-UPDRS Part III scores (P=0.02).
• No significant change in LEDD was observed post-reprogramming.
• Imaging indicated that reprogramming often involved dorsolateral or supra-STN regions, adjusting stimulation parameters.

Conclusions:

• Systematic reprogramming is an effective strategy to enhance long-term motor outcomes in STN DBS for Parkinson's disease.
• Imaging can aid in understanding and guiding optimal reprogramming strategies for STN DBS.
• Optimizing DBS parameters through reprogramming offers a valuable non-pharmacological approach to manage PD symptoms.