Subthalamic Nucleus Deep Brain Stimulation Alters Prefrontal Correlates of Emotion Induction.

Area of Science:

• Neuroscience
• Neurology
• Biomedical Engineering

Background:

• Advanced Parkinson's disease (PD) is characterized by motor symptoms.
• Deep brain stimulation (DBS) of the subthalamic nucleus (STN) is an effective treatment for motor symptoms in PD.
• STN DBS may also modulate emotional processing through its influence on limbic circuits.

Purpose of the Study:

• To investigate the impact of STN DBS on prefrontal cortex activity during emotional stimulation.
• To determine if STN DBS affects hemodynamic responses in the prefrontal cortex during emotion induction.

Main Methods:

• Near-infrared spectroscopy (NIRS) was employed to monitor prefrontal cortex hemodynamic changes.
• Seven PD patients with STN DBS were assessed in both stimulation-on and stimulation-off conditions.
• Emotional stimuli (positive, negative, neutral videos) were presented to participants.

Main Results:

• STN DBS significantly altered prefrontal oxygenated hemoglobin concentrations in response to positive and negative emotional videos.
• These observed hemodynamic changes were specific to emotional stimuli, not neutral stimuli.
• A correlation was found between STN stimulation and prefrontal cortical activity during emotional processing.

Conclusions:

• STN DBS modulates prefrontal cortical activity related to the processing of positive and negative emotions.
• These findings suggest a role for STN stimulation in influencing emotional regulation in Parkinson's disease.
• The study highlights the impact of STN DBS on neural circuits involved in emotion processing.