There is still much confusion in the understanding of dexterity in both its psychological and pedagogical aspects. None of the previously proposed definitions of this capacity has been able to win general acceptance. There is also an extreme shortage of facts from everyday observations and, even more so, from experiments.
During the past years, the general physiology and psychophysiology of movements have attained considerable success, which is due partly to the studies of athletic and gymnastic movements as the most perfect examples of healthy movements, and, on the other hand, to the studies of motor pathologies based on the abundant information on soldiers wounded during the Great Patriotic War ( World War II). So, it seemed reasonable to try to move forward in the area of motor dexterity and its development based on the new concepts that have emerged in this area. As far as the general problems of motor coordination are concerned, we refer our readers to the book On the Construction of Movements, in which these problems have been carefully examined. Here, let us present only a brief summary from that work of the most important, basic ideas that are crucial for analyzing dexterity.
According to contemporary views, any mobile system, which is not forced to follow a fixed trajectory (like most existing machines), that is, which has more than one degree of freedom, needs a special organization that makes it controllable. The peripheral human skeletal-articular-muscular apparatus has numerous redundant degrees of freedom, numbering many dozens. The totality of the psychophysiological mechanisms of motor coordination represents the organization of