It includes, first of all, disorders in the maturation of gross and fine motor skills, as well as a variety of stereotypies, tics, catatonic disorders. A delay in the formation of motor skills is noted from the period of development of hand-eye coordination. At the same time, the formation of manual skill is delayed. Children with a delay begin to grasp an object with two fingers, begin to walk later than usual. Sometimes children begin to crawl after mastering walking, for a long time they cannot master the functions of standing up. Thus, there is a violation of the sequence of the formation of motor functions.