Brain stimulation targets showed no clear difference in overall essential tremor relief
Some secondary outcomes favored posterior subthalamic stimulation, while tremor benefits weakened over time with either target.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Both stimulation targets were associated with substantial improvement in essential tremor. The pooled overall tremor result did not show a statistically clear difference between them, which does not prove equivalence. Some secondary outcomes favored PSA, but benefits declined over time with either target, so the overall score captures only part of the comparison.
This abstract-based account lacks confidence intervals for the main comparison, study-design details and clear timing for pooled outcomes, limiting assessment of precision and comparability.
What researchers found
Difference in overall tremor-score improvement
Compared with VIM on the Fahn Tolosa Marin total tremor scale, where score reductions indicate improvement. The difference was not statistically clear (p = 0.428); pooled follow-up timing was not reported.
Specific symptoms
Researchers also assessed specific tremor symptoms, quality of life, depression and adverse events. PSA showed greater head-tremor improvement and was linked to fewer speech difficulties, but these findings do not establish an advantage across all outcomes.
Other comparisons
Bilateral implantation showed no statistically significant advantage over unilateral implantation. Quality-of-life and functional results were broadly similar between targets, while the trend toward better quality of life with PSA did not reach statistical significance.
The original publication
Comparative efficacy of PSA and VIM deep brain stimulation in essential tremor: a network and multilevel meta-analysis.
Aghajanian S, Naeimi A, Mohammadifard F et al.
Neurosurg Rev · 2025
- PubMed ID
- 41160184
- Record checked
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