Volume conductor head models investigated. No-blood-vessel-model: Model without
any blood vessels, all other segmented tissues are included. Blood vessel model:
As before, but with blood vessels. This model was used with three different
blood vessel conductivities (see Methods section). No-CSF-model: As the
no-blood-vessel-model, but with CSF replaced by gray matter. Dura-as-bone-model:
As the no-blood-vessel-model, but with dura replaced by compact bone.
Dura-as-CSF-model: As the no-blood-vessel-model, but with dura replaced by CSF.
Color-coding as in Fig. 1. Note that the
holes in the rendering of the no-CSF-model are due to the very thin 3D slice
used, combined with the geometry-adapted mesh described below. These holes are
not present in the full volume model.