Dear Colleagues, A common dogma of neuroscience is that all electrical events occurring in the brain are well described by an electrostatic theory. However, adopting a geometric attitude it becomes immediately clear that the propagation of an action potential induced a non-conservative electric field within nearby spines, and thus an electromagnetic description of the function of a brain is unavoidable. I would like to present to you with a revised and simplified version of the theory I advanced last year, entitled "Dynamic Aspects of Finite Architectures". The current work can be accessed here: doi.org/10.13140/RG.2.2.20738.73925 . Best, Dinu Patirniche.