THESIS ABSTRACT Since his biological appearance the human being has been forced to create objects which facilitate his subsistence. In this process the Industrial Revolution is going to mark a moment of crucial importance in history, because the machine will assume many of the functions that, up-to-date, were a human occupation. Because of this, the individual will remain adhered, more than ever, to a technological process, a biological destination widespread and expanded by mechanisms that will alter deeply his relationship with the world. Taking art as a reflection of society, the industry, the machine and the new age were adopted as the epicentre of the 20th century artistic representations and, with that, the traditional language was subverted. The most critical sectors tried to tear into pieces the high culture speech through the merger with the popular, creating, this way, a fundamental equation: art = life. Public places, theatres, but specially bars and cafés were the scene of peculiar representations in which the body was the main starring, a particular way of thinking about the repercussions that skill inflicted into the body and his real role in the contemporary society. Freedom and enthusiasm were the concepts that defined the last century artistic avant-garde, an euphoria that vanished because of the Second World War. The body and his representation remained hidden. After the tragedy, the society was victim of a deeply conservative restructuring order. A decade was enough for certain intellectual sectors to feel they could not continue accepting a cultural and artistic desideologized content. That politically conscious state of mind encouraged demonstrations and protests recovering the purest Dadaist style as a way to attack the establishment. At the end of 1950s, both in The United States and in Europe, the action body was restored in the artistic representation as a necessary language to attack the bourgeois ideology. This leads us to 1968, a key date when the social conscience wake up against the totalitarianism and when the body recovers his category. Performance —a term that was not used as such until 1970— turned into the most appropriate language to represent the new aesthetic values, as well as to put into practice the most protest theories. A sociological art concept was consolidated little by little. It defended the body integration into the creative process, proofs that were coined as Body Art. In the 1970s we can speak again about somacentrism. Nevertheless —at this moment Body extensions in the context of the Body Art. Revolution of the wish makes sense—, some artists, unsatisfied with a materialistic body exploration, adopted elements of the embodiment such as dresses, accessories and objects of different nature. That interest that avant-guard artists showed for technology was transformed into a different one that, in spite of its differences, fulfilled the same functions that the machine acquired at the beginning of 20th century: the «corporal extension». This time it was not necessary a war to relieve the 1970s radical ideology, the appearance of AIDS, a sharp economic crisis and, as a result, an attitude of resignation and disillusion, ten years later, the end of this period. The digital age popularization has taken charge of showing a reality that moves back to the most reactionary values.