Theoretical work of psychoanalytic interest with the purpose of studying the phenomena of delusion, fantasy and reverie, in order to understand their nature and processes, their mechanisms and tasks within psychic human dynamics. The cases “Homem dos ratos” (Rats’ man), the “Schreber Case” and “Gradiva” of Jensen are used as reference, as well as Freud’s paper “A child is beaten”, to illustrate the reflections. The conclusions indicate that the three concepts are structurally different, with own processes, mechanism and tasks, but with similar approaches that could lead to misunderstanding.
Delusion; fantasy; reverie; neurosis; psychosis