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Table 1 The reference values of the absolute and relative conductivity of the compartments incorporated in the human head.

From: Review on solving the forward problem in EEG source analysis

compartments

Geddes & Baker (1967)

Oostendorp (2000)

Gonçalves (2003)

Guttierrez (2004)

Lai (2005)

scalp

0.43

0.22

0.33

0.749

0.33

skull

0.006 – 0.015

0.015

0.0081

0.012

0.0132

cerebro-spinal fluid

-

-

-

1.79

-

brain

0.12 – 0.48

0.22

0.33

0.313

0.33

σ scalp /σ skull

80

15

20–50

26

25