Table 1.

Literature-referenced conductivity values for ten tissue types for measurement frequency under 1kHz [10]. Bone conductivity (combined) was computed as $\sigma =\sqrt{{\sigma }_{can}\cdot {\sigma }_{cor}}$ (where σ_can was cancellous bone and σ_cor was the average of cortical bone conductivity reported in the reference. Isotropic white matter conductivity was simulated using the formula $\sigma =\sqrt{{\sigma }_l\cdot {\sigma }_t}$ where σ_l was longitudinal and σ_t was transverse conductivity.

Tissue types	σ (S/m)	Reference
Air	1.0×10−9 (Smooth Pipeline)	-
Blood	6.7×10−1	Geddes and Baker (1967) [57]
Bone	214 × 10−3 (cancellous) 5.52 × 10−3 (cortical) 10.9 × 10−3 (combined)	Akhtari et al. (2002) [58]
Cerebrospinal fluid	1.8	Baumann et al. (1997) [59]
Fat	2.5×10−2	Gabriel et al. (1996) [60]
Gray matter	1.0×10−1	Gabriel et al. (1996) [60]
Muscle	1.6×10−1	Geddes and Baker (1967) [57]
Sclera, lens	5.0×10−1	Gabriel et al. (1996) [60]
Skin	4.3×10−1	Holdefer et al. (2006) [20]
White matter	1.2×10−1 (trans.) 1.2 (long.)	Geddes and Baker (1967) [57]