Clinical observation results of a child 11- 17 months old are presented. The situations of symptoms' manifestations, named by L. S. Vygotsky "crisis symptoms", are analyzed. Such a behavior is due to the trend to overcome forbidding as a result of child's new abilities. The hypothesis of emotional-affective component of action subjectivization is offered: child becomes a subject of own desires and drives. It is promoted by speech development. Meaningful vocalization enables a child to hold a desire. 1-year crisis brings specific subjectivity: "I am desirous".