Neurophysiological aspects of chronic motor cortex stimulation

Area of Science:

• Neurosurgery
• Neuromodulation
• Clinical Neurophysiology

Background:

• Chronic motor cortex stimulation (MCS) is an established treatment for refractory neuropathic pain.
• Emerging evidence suggests MCS may benefit Parkinson disease symptoms and post-stroke hemiparesis motor recovery.
• The procedure involves extradural electrode placement over the motor cortex connected to a neurostimulator.

Purpose of the Study:

• To review and compare techniques for accurate motor cortex identification and electrode placement.
• To highlight the importance of intraoperative neurophysiological mapping.
• To discuss the role of clinical neurophysiology in evaluating MCS outcomes and mechanisms.

Main Methods:

• Integration of anatomical, neuroradiological, functional, and neurophysiological data for motor cortex localization.
• Intraoperative neurophysiological mapping to ensure precise electrode positioning.
• Discussion and comparison of various surgical techniques used by different research groups.

Main Results:

• Accurate motor cortex targeting is critical for successful MCS, despite advanced imaging techniques.
• Intraoperative neurophysiological mapping is essential for precise electrode placement.
• Clinical neurophysiology aids in assessing treatment efficacy and understanding underlying mechanisms.

Conclusions:

• Precise electrode placement via neurophysiological mapping is key to successful motor cortex stimulation.
• MCS shows promise for treating neuropathic pain, Parkinson disease, and post-stroke motor deficits.
• Clinical neurophysiology plays a vital role in both procedural guidance and outcome evaluation.