Physics in Medicine and Biology · 2008 · 90 citations · 12 references
EngineeringBiomedical EngineeringElectrical EngineeringComputational ElectromagneticsFinite Element MethodsNeural EngineeringCurrent DistributionElectrode Array DesignElectrode PlacementNeural Circuit ModelingNeural StimulationNeurostimulationCurrent DensityCurrent InjectionElectrical Field ModelingElectrode DesignElectrode Geometry OptimizationSimulation StudiesStimulation Site LocalizationThree-dimensional Electrode Arrays
The present study introduces a new approach to determining optimal electrode positions in transcranial direct current stimulation (tDCS). Electric field and 3D conduction current density were analyzed using 3D finite element method (FEM) formulated for a dc conduction problem. The electrode positions for minimal current injection were optimized by changing the Cartesian coordinate system into the spherical coordinate system and applying the (2+6) evolution strategy (ES) algorithm. Preliminary simulation studies applied to a standard three-layer head model demonstrated that the proposed approach is promising in enhancing the performance of tDCS.
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