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Validation of Computational Studies for Electrical Brain Stimulation With Phantom Head Experiments.

Donghyeon Kim1, Jinmo Jeong2, Sangdo Jeong3

  • 1School of Information and Communications, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 500-712, South Korea.

Brain Stimulation
|July 26, 2015
PubMed
Summary

Computational studies of electrical brain stimulation (EBS) are cost-effective but need validation. This study validated EBS numerical simulations against experimental measurements in phantom heads, showing good consistency.

Keywords:
Computational studiesCortical stimulationElectrical brain stimulationMRI-based phantom headValidation studies

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Computational Modeling

Background:

  • Computational studies of electrical brain stimulation (EBS) offer cost-effectiveness.
  • Validation of invasive cortical stimulation techniques is limited.
  • Few studies have empirically validated computational EBS models.

Purpose of the Study:

  • To validate computational electrical brain stimulation (EBS) studies.
  • To compare electric potential distributions from numerical simulations and empirical measurements.
  • To assess the accuracy of EBS modeling in different head phantom configurations.

Main Methods:

  • Constructed one-/three-layered spherical and MRI-based three-layered head phantoms.
  • Performed numerical simulations using the finite element method (FEM).
  • Conducted experimental measurements of electric potential distributions with implanted electrodes.

Main Results:

  • Numerical simulations and experimental measurements showed similar electric potential distributions.
  • Average relative differences were 5.4% for spherical phantoms and 10.3% for MRI-based phantoms.
  • Demonstrated reasonable consistency between simulated and measured electric potentials.

Conclusions:

  • Numerical simulation of EBS is consistent with experimental measurements.
  • Computational EBS studies are a cost-effective approach for extensive research.
  • Validated EBS models can support future research in brain stimulation.