The relationship between psychoanalysis and medicine is not a simple one. Historically, the origins of psychoanalysis refer to a failure of knowledge; in his quest for truth, Freud worked through this shortcoming to discover the Unconscious at the same time that he established its method of exploration. Fragments of the former knowledge—i.e., Medicine—were dragged over to the new discipline, modifying their meaning substantially (e.g., the terms symptom, trauma, and many others, do not mean the same in each of the two discourses). A review of such origins