International audienceIn current research, the self, or the “first-person perspective,” is often studied in terms of its cognitive functions (agency, “mindread- ing,” body representation, etc.). As clearly shown by Decety (2002), these studies are based on the assumption that mental processes must be “described in terms that make it clear that they are achievable by one brain.” It has been well established, however, that though one human brain is necessary, it is not sufficient for the development of a psychic subject capable of mental processes. Indeed, to do so, the brain must be connected with a particular language system, which is external and exists prior to the birth of each human brain. Psychoanalysis demonstrates that such a process n...