The English Edition contains a few differences from the first ItaHan Edition, which require an explanation. Firstly, some imag- es, especially some 3D reconstructions, have been modified in order to make them clearer. Secondly, in agreement with the Publisher, we have disowned one of our statements in the preface to the Italian Edition. Namely, we have now added a brief introductory text for each section, by way of explanation to the anatomical and physiological notes. This should make it easier for the reader to understand and refer to this Atlas. These differences derive from our experience...