Evidence map›Paper›PMID 40423665›Full record

Trial reportEpilepsia2025

Optimizing stimulation parameters for anterior thalamic nuclei deep brain stimulation in epilepsy: A randomized crossover trial.

Juan Luis Alcala-Zermeno, Nicholas M Gregg, Gamaleldin Osman, Jayawant N Mandrekar, Keith Starnes, Gregory Worrell, Brian N Lundstrom

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Epilepsia, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

6 citing papers in PubMed.

  1. Article
  2. A guide to neuromodulation in drug-resistant epilepsy.Epileptic disorders : international epilepsy journal with videotape · 2026
    Review
  3. Article
  4. Short-Term Modulation of Epileptic Network with Low-Frequency Thalamic Stimulation.medRxiv : the preprint server for health sciences · 2025
    Article
  5. Review
  6. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Juan Luis Alcala-ZermenoDepartment of Neurology, Mayo Clinic, Rochester, Minnesota, USA.
Nicholas M GreggDepartment of Neurology, Mayo Clinic, Rochester, Minnesota, USA.ORCID https://orcid.org/0000-0002-6151-043X
Gamaleldin OsmanDepartment of Neurology, Mayo Clinic, Rochester, Minnesota, USA.
Jayawant N MandrekarDivision of Clinical Trials and Biostatistics, Department of Quantitative Health Sciences, Mayo Clinic, Rochester, Minnesota, USA.
Keith StarnesDepartment of Child and Adolescent Neurology, Mayo Clinic, Rochester, Minnesota, USA.
Gregory WorrellDepartment of Neurology, Mayo Clinic, Rochester, Minnesota, USA.ORCID https://orcid.org/0000-0003-2916-0553
Brian N LundstromDepartment of Neurology, Mayo Clinic, Rochester, Minnesota, USA.ORCID https://orcid.org/0000-0002-5310-5549

Funding

Thalamic stimulation to prevent impaired consciousness in epilepsyUH3NS112826 · NINDS · YALE UNIVERSITY · PI BLUMENFELD, HAL · 2021 to 2023
$5.4M
Neurophysiologically Based Brain State Tracking & Modulation in Focal EpilepsyUH3NS095495 · NINDS · MAYO CLINIC ROCHESTER · PI WORRELL, GREGORY A · 2019 to 2021
$2.8M
Novel Diagnostic Stimulation to Quantify Cortical Excitability and Guide Epilepsy TherapyR01NS129622 · NINDS · MAYO CLINIC ROCHESTER · PI Brian Nils Lundstrom · 2023 to 2026
$1.6M
NINDS NIH HHS R01 NS129622NINDS NIH HHS UH3 NS095495NINDS NIH HHS UH3 NS112826
6 · The paper itself

Abstract

objectiveThe effects of brain stimulation for diseases like epilepsy are delayed, making stimulation optimization difficult. The parameters for anterior thalamic nuclei (ANT) deep brain stimulation (DBS) for focal drug-resistant epilepsy management are often restricted to those used in the SANTE landmark trial. There is little evidence regarding effective alternatives, and low-frequency stimulation is typically neglected. We prospectively compare a widely differing stimulation parameter set to typical settings.

methodsThis randomized, modified crossover, open trial compares the efficacy and safety of an alternative set of parameters using continuous low-frequency stimulation (cLFS) with a longer pulse width (7 Hz, 200 μs, continuous) compared to SANTE's intermittent high-frequency stimulation (iHFS) with a short pulse width (145 Hz, 90 μs, cycling 1 min on/5 min off). After 3 months on a randomly assigned first set, patients are switched to the other settings, unless seizure-free. Patients are re-evaluated after 3 more months, which marks the completion of the trial. After that, they can either remain on the same settings or switch back.

resultsSixteen patients with a median baseline seizure frequency of 13.8 seizures/month (interquartile range [IQR] = 2.7-22.8) were included in the analysis. At trial completion (median follow-up = 30 weeks, IQR = 26-35), ANT-DBS significantly reduced median seizure frequency (62%, IQR = 18-81, Wilcoxon test statistic [W] = 99, p = .008). Both iHFS (33%, IQR = 0-65, W = 81, p = .02) and cLFS (73%, IQR = 30-79, W = 105, p = .001) significantly reduced median seizure frequency. cLFS showed improved median seizure frequency reduction compared to iHFS (W = 63, p = .03) and was not associated with any moderate or severe adverse effects. SIGNIFICANCE: Results support cLFS for ANT-DBS as a safe and effective alternative to typical iHFS parameters. Stimulation with widely differing parameter sets may be as effective as or, in some situations, more effective than typical stimulation parameters.

Indexed as

Anterior Thalamic NucleiDeep Brain StimulationDrug Resistant EpilepsyAdultCross-Over StudiesFemaleHumansMaleMiddle AgedProspective StudiesTreatment OutcomeYoung Adultalternative settingscontinuouslow frequencyneuromodulationneurostimulation

Identifiers

PMID40423665
PMCPMC12246973

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.