Figure 5

Differences in scalp potentials of head models for an x oriented dipole in the motor cortex area. The contours for the Model 1 – Model 2 (top left plot) are very symmetrical and exhibit a dipolar pattern. The negative contours for the Model 1 – Model 3 (top right plot) dominate the plot. The Contour plots for the Model 1 – Model 4 (bottom left plot) are also symmetrical and exhibit a dipolar pattern. The contours of the Model 2 – Model 3 are also dominated by negative contours.