The article follows the previous text dealing with the interpretation of the course of motoric development of the child, based on basic biomechanical principles and leaming. That is how it different from the prevailing opinion that the development is given by releasing (maturation) of inherited (genetically determined) motor pattems. In view of the extent the problém is divided in two independent parts. This second part includes monokinetic, dromokinetic and kratikinetic stage of the suckling period and the toddler period, partly extending into the pre-school and young-school age. The previously described Bemstein principle of controlled restriction and releasing of DPF is further supplemented and development in the concept of dynamic systém according to Thelen. Vety briefly is outlined the problém of motoric disorders and the conclusion summarizes basic principles of alternativě interpretation of the course of motor development.

        Key words: posture, postural reactions, DOF, dynamic systém