Theoretical Descriptions of the Nucleon Electromagnetic Form Factors in   the Space- and Time-like regions
  Some recent advances in the theoretical description of the Nucleon electromagnetic form factors, both in the space- and time-like regions, will be briefly illustrated. In particular, both the present stage of the lattice calculations and updated phenomenological approaches, like the ones based on dispersion relations and on microscopical models, will be reported. 
Giovanni Salm\`e (INFN - Rome)