The process underlying the generation of the EEG signals can be
described as a set of current sources within the brain. The
potential distribution produced by these sources can be measured
on the scalp and inside the brain by means of an EEG recorder.
There is a well-known mathematical model that relates the
electric potential in the head with the intracerebral sources. In
this work, we study and prove some properties of the solutions of
the model for known sources. In particular, we study the error in
the potential, introduced by considering an approximated shape of
the head.