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. Author manuscript; available in PMC: 2020 Apr 13.
Published in final edited form as: PM R. 2018 Sep;10(9 Suppl 2):S157–S164. doi: 10.1016/j.pmrj.2018.04.012

Figure 2. Spheric Head Model Simulations Suggest that tDCS current in the order of 10 mA in humans generate electric fields that are experimentally shown to cause no damage in rodent brain.

Figure 2.

A-D, A human spherical head model of radius 8 cm with bihemispheric C3/C4 montage is used to simulate electric fields using 1, 2, 5 and 10 mA currents. E-F, Rat spherical head model of radius 0.8 cm is used to simulate electric fields using 0.1 mA current with F3 montage (E) and C3/C4 montage (F). 0.1 mA current was shown to be safe in rodents for tDCS duration of 4.5 hours (270 minutes).22 Note close similarity of generated electric field intensity between 10 mA human model (D) and 0.1 mA rat model (F) and compare it with conventional 1 mA (A) and 2 mA (B) currents in human tDCS applications. Figure panels are generated with SPHERES14 and adapted.