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. Author manuscript; available in PMC: 2012 Aug 1.
Published in final edited form as: Neuroimage. 2011 May 18;57(3):885–891. doi: 10.1016/j.neuroimage.2011.05.026

Figure 1.

Figure 1

Construction of patient-specific cortical electrical field model. (a) tDCS pads were placed with the anode electrode over the occipital pole (Oz) and cathode overlying the vertex (Cz) (b) the patient’s occipital lesion (filled in red) was located with the left hemisphere along the upper and lower banks of the calcarine sulcus. Note that the anode electrode was positioned along the midline to stimulate both the intact and lesioned hemispheres and encompassed the entire lesioned area (see electrode outline in posterior view). (c) Selected compartments from the finite element method (FEM) model (from left to right: skull, meninges, gray matter, white matter). (d) Posterior views of cortical tDCS electrical field map. The white arrow indicates an area of higher regional electrical field corresponding to the lesioned left hemisphere.