The article analyses the place of emotions in the psychic social constitution, highlighting, overall, the Vigotsky's contribution. The text focus on two of the main ideas which caused an impact in the psychology reconstructions by Vygotsky: the psychic functions in the activity and the signals mediation in the constitution of the functions. The concept of "social situation development" reveals Vygotsky's preocupation to integrate the richness of the internal processes, constituted in the former subject history, with the influences that give the characteristic to each of the social moments of the development. We also focus on the importance that the "experience" and the "necessity" category has in Vygotsky's thought. At last, it's analized the "personality" issue as a theoretical construction that recognizes ontologically the individual subjectivity, understood as a process of a subject that exists socially.