Boundary element fast multipole method for modeling electrical brain stimulation with voltage and current electrodes.

ABSTRACT: Objective. To formulate, validate, and apply an alternative to the finite element method (FEM) high-resolution modeling technique for electrical brain stimulation-the boundary element fast multipole method (BEM-FMM). To include practical electrode models for both surface and embedded electrodes.Approach. Integral equations of the boundary element method in terms of surface charge density are combined with a general-purpose fast multipole method and are expanded for voltage, shunt, current, and floating electrodes. The solution of coupled and properly weighted/preconditioned integral equations is accompanied by enforcing global conservation laws: charge conservation law and Kirchhoff's current law.Main results.A sub-percent accuracy is reported as compared to the analyt

SUBMITTER: Makarov SN 

PROVIDER: S-EPMC8783394 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature