Motility, relating to the vital energy of the human tissues, is a basic concept in osteopathy. This book presents a simple and systematic definition of motility, based on the movement of all of the body's structures during embryogenesis. Those initial movements, intrinsic to the energy of the tissues, are the essence of motility and, as such, they are crucial to the tissues' normal movement. These fundamental ideas expand the osteopath's clinical intervention techniques and deepen the understanding of both the bases of osteopathy and of human functions. Illustrated in two colours with clear and original line drawings and photographs, this book offers the new model of practice developed by Alain Auberville over his 30 years of experimentation and teaching; it is presented here by Andree Aubin, who has linked Alain Auberville's approach to classic osteopathic concepts in order to facilitate its integration into regular clinical practice.