Microelectrode recording and macrostimulation in thalamic and subthalamic MRI guided stereotactic surgery

Area of Science:

• Neurosurgery
• Electrophysiology
• Neurology

Background:

• Stereotactic neurosurgery requires precise targeting for lesions or electrodes.
• Electrophysiological methods (microelectrode recording, macrostimulation) aid targeting alongside imaging.
• The necessity of these electrophysiological procedures has recently been debated.

Purpose of the Study:

• To retrospectively evaluate the utility of electrophysiological procedures in stereotactic neurosurgery.
• To assess the role of electrophysiological confirmation for thalamic and subthalamic targets.

Main Methods:

• Retrospective analysis of over 500 therapeutic stereotactic lesions.
• Focus on lesions at thalamic and subthalamic levels.
• Comparison of outcomes with and without intraoperative electrophysiological confirmation.

Main Results:

• Electrophysiological confirmation was found to be mandatory for two of the three studied stereotactic targets.
• This necessity is due to target size variability and proximity to eloquent brain structures.
• The study supports the continued use of electrophysiological monitoring in specific neurosurgical contexts.

Conclusions:

• Intraoperative electrophysiological confirmation is crucial for specific stereotactic targets, particularly in the thalamus and subthalamus.
• These procedures are vital for navigating anatomical variations and safeguarding eloquent brain areas.
• The findings underscore the indispensable role of electrophysiology in optimizing stereotactic neurosurgical outcomes.