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Radii and electrical conductivities of the present four-sphere model.
| Labels | Name | Radius (cm) | σ (S/m) |
|---|---|---|---|
| 1 | Brain | 7.9 | σbrain = 0.33 |
| 2 | CSF | 8.0 | 5σbrain |
| 3 | Skull | 8.5 | σbrain/K |
| 4 | Scalp | 9.0 | σbrain |
σ is the conductivity in each of the specified regions. Three variants of the model were considered with skull conductivity reduced by a factor K (20, 40, or 80) compared to the conductivity of the brain.
