Surgical treatments for essential tremor

Area of Science:

• Neurology
• Neurosurgery
• Medical Technology

Background:

• Essential tremor is the most common pathological tremor.
• Severe essential tremor often becomes refractory to pharmacotherapies.
• Surgical interventions target the cerebellothalamocortical pathway to abolish tremor.

Purpose of the Study:

• To review current surgical methods for essential tremor.
• To evaluate the efficacy, safety, and cost of various surgical techniques.
• To identify key research questions for advancing surgical treatments.

Main Methods:

• A comprehensive PubMed search was conducted for essential tremor and surgery.
• 379 papers were selected for review focusing on stereotactic deep brain stimulation (DBS), stereotactic radiosurgery (SRS), focused ultrasound (FUS) ablation, and radiofrequency ablation.
• The review covers methods, efficacy, safety, and expense of these procedures.

Main Results:

• Surgical therapies like DBS, SRS, FUS, and radiofrequency ablation can reduce upper extremity tremor by over 80%.
• These surgical options are significantly more effective than current drug therapies.
• Current research focuses on comparing unilateral vs. bilateral procedures, thalamic vs. subthalamic targeting, and imaging-based vs. atlas-based targeting.

Conclusions:

• Surgical interventions represent a highly effective treatment for severe essential tremor.
• Further research, including randomized controlled trials, is needed to optimize surgical techniques and targeting.
• Key areas for investigation include comparative safety, efficacy, and cost-effectiveness of different surgical approaches.