The term Art Brut, coined by the french artist Jean Dubuffet in 1945, describes the art created by unadapted, deranged, visionary, medium, alienated people. It is sometimes misapplied for other marginal expressions, such as outsider art, singular art or folk art, since in many cases it is actually difficult to trace the boundaries between each genre.
It is defined by the rejection of the established art scene, primarily on the commercial and social promotion premises of the creative act. The works created by these artists, without any academic constraints, formal training or specific formatting, emerge spontaneously as an impulse, an inner scream that urges to be heard, springing from their guts, often as a means of therapy for their mental disorders.
Once obscured, it is now considered by many as the most genuine and vital art. There is no collection of any museum of modern art from any great capital that can be considered fully complete without at least a couple of works of this kind. So it is in the MoMa in New York, the Tate Modern in London and the Centre Pompidou in Paris.