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. Author manuscript; available in PMC: 2022 Jan 1.
Published in final edited form as: IEEE Trans Biomed Eng. 2020 Dec 21;68(1):308–318. doi: 10.1109/TBME.2020.2999271

Fig. 4.

Fig. 4.

EEG/MEG responses of a cortical equivalent dipole layer computed via BEM-FMM. The total area of the cortical layer is 360 mm2. Current dipole moment density q0 (current dipole moment per unit cross sectional area of the active cortex) in the source region is given by the value q0 = 1 nA · m/mm2 (Okada-Murakami constant). a) Problem geometry. b) Close-up view of the dipole layer. c) The electric potential on the skin surface using a linear scale; d) The magnitude of the total magnetic field 18 mm away from the skin surface using a linear scale. The center of the white cross coincides with projection of the geometrical center of the layer onto a transverse plane.