Determination of optimal electrode positions for transcranial direct current stimulation (tDCS).
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.
Im
Chang-Hwan
CH
Department of Biomedical Engineering, Yonsei University, Wonju 220-710, Korea. ich@yonsei.ac.kr
Jung
Hui-Hun
HH
Choi
Jung-Do
JD
Lee
Soo Yeol
SY
Jung
Ki-Young
KY
D004558:Electric Stimulation / Q000379:methods; D004566:Electrodes; D004574:Electromagnetic Fields; D020342:Finite Element Analysis; D006257:Head / Q000502:physiology*; D006801:Humans