Individualized Anatomy-Based Targeting for VIM-cZI DBS in Essential Tremor.

Area of Science:

• Neurosurgery
• Neurology
• Medical Devices

Background:

• Deep brain stimulation (DBS) of the ventral intermediate nucleus (VIM) or caudal zona incerta (cZI) is a recognized treatment for essential tremor (ET).
• Refining stereotactic planning is crucial for optimal lead placement in DBS for ET.
• This study introduces an individualized anatomy-based planning protocol targeting both VIM and cZI.

Purpose of the Study:

• To develop and evaluate an individualized anatomy-based stereotactic planning protocol for VIM-cZI deep brain stimulation in essential tremor patients.
• To assess the safety and efficacy of this novel targeting strategy.

Main Methods:

• Thirty-three patients with essential tremor underwent VIM-cZI lead implantation using the developed protocol.
• Targeting involved indirect methods adjusted with anatomic landmarks, including red nuclei and ipsilateral subthalamus.
• Outcomes were assessed over a mean follow-up of 31.1 months, with active contact coordinates analyzed using MATLAB Lead-DBS.

Main Results:

• A mean tremor improvement of 79.7% was achieved and sustained throughout the follow-up period.
• Postoperative active contact coordinates were consistently located within the VIM/cZI region.
• No hemorrhagic complications were reported in the study cohort, indicating a favorable safety profile.

Conclusions:

• Individualized anatomy-based targeting for VIM-cZI deep brain stimulation is a feasible and safe method for essential tremor.
• This approach is associated with significant and durable tremor reduction.
• The protocol offers a refined strategy for stereotactic planning in DBS for essential tremor.