Subthalamic nucleus deep brain stimulation in primary cervical dystonia.

Area of Science:

• Neurology
• Neurosurgery

Background:

• Globus pallidus internus deep brain stimulation (DBS) is a primary treatment for severe dystonia.
• Some patients experience bradykinesia with GPi DBS.
• Subthalamic nucleus DBS is an alternative but lacks extensive study.

Purpose of the Study:

• To evaluate the safety, efficacy, quality of life, and neuropsychological effects of bilateral STN DBS in cervical dystonia.
• To assess STN DBS as an alternative to GPi DBS.

Main Methods:

• Prospective pilot study of 9 patients with medically refractory cervical dystonia.
• Bilateral STN DBS implantation.
• Dystonia severity assessed using the Toronto Western Spasmodic Torticollis Rating Scale (TWSTRS) by a blinded rater.
• Neuropsychological assessments and quality of life measures were recorded.

Main Results:

• STN DBS was well-tolerated with no serious adverse events.
• Significant improvement in TWSTRS scores (p < 0.001) from baseline to 12 months.
• Improved quality of life and no consistent neuropsychological deficits.
• No bradykinetic side effects, though transient dyskinetic movements occurred.

Conclusions:

• Bilateral STN DBS is safe and effective for treating primary cervical dystonia.
• STN DBS offers significant symptom improvement and enhanced quality of life.
• STN DBS presents a promising alternative to GPi DBS for cervical dystonia treatment.