In addition to participating in Lacan's seminars and translating his Écrits into Spanish, he has authored numerous books in French, translated in 13 languages.
He received the prestigious French Legion of Honor. He was a professor at the University of Paris VII Sorbonne for 30 years from 1971 and for three years, had a seminar in the école Freudienne de Paris (1977-1980), after its dissolution in 1980, he founded the Séminaires Psychanalytiques de Paris (1986). In may 1979, he did a course about the theme 'subject of the unconscious', in the seminar of Lacan. He emigrated to France in 1969 where he followed the classes of Jacques Lacan. After qualifying as a doctor from the University of Buenos Aires, Nasio completed his residency as a psychiatrist at the hospital in Lanús.