This dissertation examines the experimentalism of the brazilian artist Lygia Clark (1920-1988), especially in her final artistic phase, Structuring the Self (1976-1988). By bringing together art and psychoanalysis, I tried to find hints of the activation of new subjectivities and of the creative exercise, based on work with the body. The first part of this dissertation focuses on the debate between concrete and neoconcrete art which occurred in the 1960 s, as seen through the work and the texts of the artist. It also intends to establish an inventory of her investigations leading to invocation of the common man`s poetic potential. Following the first part, I attempt to present the mechanisms of the art system in which experimental works such as those of Lygia Clark are included, and I discuss the transformation of the 1960 s/70 s experimentalism in experimental art by the circuit. Besides, I approach the game of refusal and capture between artists and art institutions, as well as the borderline situation in which the Clark s work is located, as it enters the field of psychological clinic. The third part of this writing is dedicated to the analysis of the politics of subjectivation carried through in the capitalist system and the reaction manifested in the singularization processes of individuals or groups. Approaching the tension between the public and private spheres, I attempt to show the relevance of localized and even individual actions, attributed to the economy of desire, in the network of social relations, conferred upon political economy. Finally, I investigate the liberating potential found in the last experimental phase of Lygia Clark, The Structuring of the Self, that could lead the participant to a more creative being in the world, in the face of objective reality.