Calculation of Speci c Absorption Rate (SAR) in Human Brain Neurons Using Complex Permittivity

The e ect of the external electromagnetic radiation on the human brain has been investigated by the numerical calculation of the frequency-dependent complex permittivity. Using the Hodgkin-Huxley neuron model, an analytical method for the calculation of the electromagnetic power absorption in the brain neurons is proposed based on the complex permittivity of neuron membranes. The e ect of the human head is considered through the calculation of forward and backward traveling electromagnetic waves. The modi ed time-dependent Hodgkin-Huxley equations have been used to obtain the re ectivity and transmissivity of the external stimulus at the membrane of the cell. The amount of the absorbed energy by the human head is presented in the form of the electromagnetic absorption rate