Deep Brain Stimulation for Epilepsy: Optimal Targeting and Clinical Outcomes

Area of Science:

• Neurology
• Neurosurgery
• Epileptology

Background:

• Investigating deep brain stimulation (DBS) for drug-resistant epilepsy in patients unsuitable for surgery.
• Exploring numerous DBS targets due to diverse epilepsy network involvement.

Purpose of the Study:

• To systematically review existing literature on DBS for epilepsy.
• To analyze surgical targets, patient characteristics, outcomes, and electrode placements.
• To create a database and atlas of DBS targets for future research.

Main Methods:

• Conducted a systematic review of 124 studies involving 1,210 patients.
• Collected data on 20 distinct surgical targets and precise electrode coordinates.
• Mapped electrode coordinates to a common template space to correlate with clinical outcomes.

Main Results:

• Identified significant relationships between stimulation location and outcomes for anterior (ANT) and centromedian (CM) nuclei DBS.
• Found shorter distance to the mammillothalamic tract junction correlated with greater seizure reduction in ANT-DBS.
• Observed that CM-DBS outcomes may depend on epilepsy type, with parvocellular CM stimulation benefiting generalized epilepsy.

Conclusions:

• Accurate targeting and precise electrode placement are critical for effective DBS in epilepsy treatment.
• A publicly available database and atlas of DBS targets are provided for further meta-analytical research.