In this article Delgado denies the theory of psycho-physical parallelism, as well as all attempts to explain psychic processes anatomically. As in his other writings, here too he takes up his position on psycho-analytic ground and emphasises the importance of the erotogenic zones, whose function best enables us to understand the connection between the organic and the psychic. Unfortunately, here again the author brings Adler's theory of organ-inferiority too closely into relation with psycho-analysis.