The advances of basic sciences combined with the perspectives of developmental neurology have recently modified the traditional outlook on the evolution of motor behaviour. The maturation of neuro-anatomic structures is studied nowadays as just one facet of a complex process: the various elements of innate global patterns, the acquisition of antigravitary schemes as well as manipulative and praxic skills, control of posture and gait, ocular motility and motricity, converge to create the present picture of a continuous adaptive interaction between the child's genotype and its environment. This book stimulates the debate and the exchange of concepts between researchers and clinical specialists.