This article resumes the concept of mental weakness in the history of Psychoanalysis in order to verify the way Lacan took this notion in his theory. We will investigate the Lacanian hypothesis of a structural mental weakness as well as its pathological aspects which requires the differential diagnosis in relation to psychosis, psychosomatics and intellectual inhibition. Finally, we will propose a matheme for mental weakness.
Mental weakness; Lacan; Psychoanalysis; Psychopathology; Children
