Sensitivity Analysis of the Forward Electroencephalographic Problem Depending on Head Shape Variations

Figure 6

The electric surface potential (mV s) originating from a spherical homogeneous conductor including a perturbed upper part (left column) as described in Section 4.2. The firing of neurons take place in the northern hemisphere, namely, at (1)  m, , , and; (2)  m, , , and; and (3)  m and , . The corresponding recording concerning the unperturbed instance is shown in the middle column for the same dipole configuration, whereas the right column displays the contribution of the first-order correction on as expressed by (32) for .