Can We Put Aside Microelectrode Recordings in Deep Brain Stimulation Surgery?

Area of Science:

• Neurosurgery
• Neurophysiology
• Medical Imaging

Background:

• Deep brain stimulation (DBS) surgery traditionally relies on microelectrode recording (MER) for accurate target localization.
• Advancements in imaging techniques have led to proposals for imaging-guided DBS, potentially eliminating the need for MER.
• This approach suggests the possibility of 'asleep' DBS surgery, enhancing patient comfort and reducing procedure time.

Discussion:

• Despite imaging progress, MER remains essential for defining DBS targets due to the non-homogeneous nature of deep brain nuclei.
• Neurophysiological techniques, including evoked potentials and motor stimulation, can safely identify critical neural structures even during sleep.
• MER provides invaluable real-time data, crucial for identifying specific subregions within targets like the subthalamic nucleus (STN) or globus pallidus interna (GPi), and is particularly vital for thalamic or hypothalamic surgeries.

Key Insights:

• MER offers superior precision in identifying functional brain targets compared to imaging alone, especially within complex structures.
• Neurophysiological monitoring during DBS surgery provides critical insights into brain function and disease pathology.
• The integration of MER with imaging enhances surgical accuracy and safety, leading to improved patient outcomes.

Outlook:

• Future DBS procedures may involve a hybrid approach, combining advanced imaging with MER for optimal target selection and safety.
• Continued research into neurophysiological mapping can refine DBS targeting strategies and expand its therapeutic applications.
• Evaluating the cost-effectiveness of advanced medical technologies is crucial for widespread adoption and equitable healthcare access.