A model for frequency dependence of conductivities of the live human skull

A mathematical model (sigma(omega) approximate to Aomega(alpha), where, sigmaequivalent toconductivity, omega=2pif equivalent to applied frequency (Hz), A (amplitude) and alpha (unitless) equivalent to search parameters) was used to fit the frequency dependence of electrical conductivities of compact, spongiosum, and bulk layers of the live and, subsequently, dead human skull samples. The results indicate that the fit of this model to the experimental data is excellent. The ranges of values of A and a were, spongiform (12.0-36.5,0.0083-0.0549), the top compact (5.02-7.76,-0.137-0.0144), the lower compact (2.31-10.6,0.0267-0.0452), and the bulk (7.46-10.6, 0.0133-0.0239). The respective values A and cc for the respective layers of the dead skull samples were (40.1-89.7, -0.0017-0.0287), (5.53-14.5, -0.0296 -0.0061), (4.58-15.9, -0.0226-0.0268), and (12.7-25.3, -0.0158-0.0132).