Convolution computer processing of the brain electriacl image transmission

A propagation model of electrical activities between the cerebral cortex and the scalp is presented in this paper. This work is based on a hypothesis of a distribution of cortical sources in a non-uniform dipolar sheet. The general field equations show that the electrical image of the cortex on the scalp is given by the convolution of the cortical potential and a transfer function. We then present several numerical evaluations with respect to the attenuation of the signal, the visual field of the electrodes and the approximation errors that have been introduced. Simulation experiments then enable us to test the behaviour of the model in comparison with complex electrical activities.