Model-based optimized phase-deviation deep brain stimulation for Parkinson 's disease.

Area of Science:

• Neuroscience
• Computational Biology
• Biomedical Engineering

Background:

• High-frequency deep brain stimulation (HF-DBS) of the subthalamic nucleus (STN), globus pallidus interna (GPi), and globus pallidus externa (GPe) are established treatments for Parkinson's disease (PD).
• Single-target HF-DBS can lead to physical damage, side effects, and high energy consumption.
• Optimizing DBS parameters and target selection is crucial for improving PD treatment efficacy and patient outcomes.

Purpose of the Study:

• To computationally investigate combined DBS (CDBS) of two nuclei with phase-deviated waveforms in basal ganglia-thalamic circuits.
• To explore novel stimulation strategies for reducing adverse effects and energy consumption in PD treatment.
• To identify optimal stimulation patterns and target combinations for enhanced PD therapy.

Main Methods:

• Utilized a biophysically-based computational model of basal ganglia-thalamic circuits.
• Simulated three CDBS strategies: STN and GPe (SED), STN and GPi (SID), and GPi and GPe (GGD).
• Analyzed the effects of anti-phase stimulation on neuronal synchronization and thalamic relay function, alongside energy consumption.

Main Results:

• Anti-phase CDBS demonstrated superior efficacy in improving parkinsonian dynamical properties, including neuronal desynchronization and thalamic relay recovery.
• Anti-phase SED and GGD were found to be more effective than SID.
• SED and GGD significantly reduced energy consumption by 72.5% and 65.5%, respectively, compared to conventional HF-DBS.

Conclusions:

• Anti-phase CDBS represents a promising strategy for optimizing PD treatment by enhancing therapeutic effects and reducing energy demands.
• SED and GGD offer significant advantages over SID in terms of efficacy and energy efficiency.
• These findings provide valuable insights for refining DBS parameter selection and target choice in clinical practice for Parkinson's disease.