The objective of this work is to discuss concepts of Historical-Cultural Psychology considered essencial to explain the psychological constitution of the human being. From the conception of being human, its development and history, a notion of mediated action as the founder of human psyche is rescued, attributing to it an inexorably social character. To the notion of mediated action, a concept of activity is related, which correspond to action, but goes beyond that, as the different possibilities of readings and interference arise for the individual. The analysis of activity, presupposes a glance over the multiple relations that characterize the triad: social context, subject and action, which are based in the meanings here (re)produced, transformed and appropriated.
activity; meaning; constitution of the subject