  Accurate electromagnetic modelling of the head of a subject is of main
interest in the fields of source reconstruction and brain stimulation. Those
processes rely heavily on the quality of the model and, even though the
geometry of the tissues can be extracted from magnetic resonance images (MRI)
or computed tomography (CT), their physical properties such as the electrical
conductivity are hard to measure with non intrusive techniques. In this paper,
we propose a tool to assess the uncertainty in the model parameters as well as
compute a parametric electroencephalography (EEG) forward solution and current
distribution for transcranial direct current stimulation (tDCS).
