Evidence map›Paper›PMID 32504827›Full record

ArticleBrain stimulation

A systematic exploration of parameters affecting evoked intracranial potentials in patients with epilepsy.

Bornali Kundu, Tyler S Davis, Brian Philip, Elliot H Smith, Amir Arain, Angela Peters, Blake Newman, Christopher R Butson, John D Rolston

Open access · goldAbstract read
In one paragraph

Article in Brain stimulation. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed, 1 pooled it
3.4field-weighted citation impact, top 7% of its field
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

39 citing papers in PubMed, 1 synthesis or guideline pooled it, 60 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Optimization of cortico-cortical spectral response analysis parameters for seizure onset zone localization.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2026
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. The Physics and Physiology of Electrical Stimulation of the Brain.Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society · 2025
    Article
  13. Review
  14. Article
  15. Article
  16. Macroscale Traveling Waves Evoked by Single-Pulse Stimulation of the Human Brain.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  17. Article
  18. Review
  19. Article
  20. Article
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

9 authors at 1 institution in 1 country.

Bornali KunduDepartment of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, UT, USA.
Tyler S DavisDepartment of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, UT, USA.
Brian PhilipDepartment of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA.
Elliot H SmithDepartment of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, UT, USA.
Amir ArainDepartment of Neurology, Clinical Neurosciences Center, University of Utah, Salt Lake City, UT, USA.
Angela PetersDepartment of Neurology, Clinical Neurosciences Center, University of Utah, Salt Lake City, UT, USA.
Blake NewmanDepartment of Neurology, Clinical Neurosciences Center, University of Utah, Salt Lake City, UT, USA.
Christopher R ButsonDepartment of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, UT, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA; Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, UT, USA.
John D RolstonDepartment of Neurosurgery, Clinical Neurosciences Center, University of Utah, Salt Lake City, UT, USA; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, USA; Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, UT, USA. Electronic address: neuropub@hsc.utah.edu.
University of Utah · US

Funding

Vascular Health and Risk Factors in Children with Down SyndromeKL2TR002539 · NCATS · UNIVERSITY OF UTAH · PI MURTAUGH, MAUREEN A, NYGAARD, INGRID E · 2018 to 2022
$4.3M
Patient-Specific Modeling and Network Perturbation to Enhance the Predictability of Direct Cortical Stimulation for EpilepsyK23NS114178 · NINDS · UNIVERSITY OF UTAH · PI ROLSTON, JOHN D · 2019 to 2023
$961k
Propagation patterns of microelectrode-recorded human interictal dischargesR21NS113031 · NINDS · UNIVERSITY OF UTAH · PI ROLSTON, JOHN D · 2019 to 2019
$427k
NCATS NIH HHS KL2 TR002539NINDS NIH HHS K23 NS114178NINDS NIH HHS R21 NS113031
6 · The paper itself

Abstract

backgroundBrain activity is constrained by and evolves over a network of structural and functional connections. Corticocortical evoked potentials (CCEPs) have been used to measure this connectivity and to discern brain areas involved in both brain function and disease. However, how varying stimulation parameters influences the measured CCEP across brain areas has not been well characterized.

objectiveTo better understand the factors that influence the amplitude of the CCEPs as well as evoked gamma-band power (70-150 Hz) resulting from single-pulse stimulation via cortical surface and depth electrodes.

methodsCCEPs from 4370 stimulation-response channel pairs were recorded across a range of stimulation parameters and brain regions in 11 patients undergoing long-term monitoring for epilepsy. A generalized mixed-effects model was used to model cortical response amplitudes from 5 to 100 ms post-stimulation.

resultsStimulation levels <5.5 mA generated variable CCEPs with low amplitude and reduced spatial spread. Stimulation at ≥5.5 mA yielded a reliable and maximal CCEP across stimulation-response pairs over all regions. These findings were similar when examining the evoked gamma-band power. The amplitude of both measures was inversely correlated with distance. CCEPs and evoked gamma power were largest when measured in the hippocampus compared with other areas. Larger CCEP size and evoked gamma power were measured within the seizure onset zone compared with outside this zone.

conclusionThese results will help guide future stimulation protocols directed at quantifying network connectivity across cognitive and disease states.

Indexed as

Electrodes, ImplantedAdultBrain MappingCerebral CortexDeep Brain StimulationDrug Resistant EpilepsyElectroencephalographyEvoked PotentialsFemaleGamma RhythmHumansMaleMiddle AgedRandom AllocationYoung AdultCorticocortical evoked potential (CCEP)GammaPowerSingle-pulse electrical stimulation (SPES)Stereoelectroencephalography (SEEG)

Identifiers

PMID32504827
PMCPMC7494632
OpenAlexW3033439214

What OpenQuestion holds

Textmetadata
LicenceTDM
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.