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. Author manuscript; available in PMC: 2011 Mar 24.
Published in final edited form as: Conf Proc IEEE Eng Med Biol Soc. 2009;2009:3169–3172. doi: 10.1109/IEMBS.2009.5334510

Figure 2.

Figure 2

Three-dimensional EEG spherical models showing (a) central and lateral ventricle regions. The spheres each have relative radii of 0.25 and are centered at z = 0.33 and z=0.5. The elliptical lateral ventricle structures had relative radial locations of (x, y, z) = (-0.2, 0, 0.3) and (0.2, 0, 0.3) and semiaxes of 0.15, 0.44 and 0.15 in x, y and z axes respectively, (b) Layered spherical model with EEG layout. Conductivities used in the layered model were: CSF (1.3 S/m); Scalp (0.43 S/m); Skull (15 mS/m); Brain (0.127 S/m). The fontanel was either chosen as skull or skin. (c) axial, saggital and coronal views of realistic geometry model, showing ventricle and central structures.