In 1963 Antonucci studied psychoanalysis with Roberto Assagioli, the founder of psychosynthesis, and began to dedicate himself to psychiatry trying to solve the problems of the patients and avoiding hospitalisation and any kind of coercive method.
Aastal 1963 õppis Antonucci psühhoanalüüsi koos psühhosünteesi rajaja Roberto Assagioliga ja hakkas pühenduma psühhiaatriale, püüdes lahendada patsientide probleeme ja vältida hospitaliseerimist ja mistahes sundmeetodeid.