A long tradition in psychiatry postulated an inborn human drive for art-creation leading to a specific style in the art of psychiatric patients, especially those suffering from a schizophrenia.Prinzhorn and Navratil are to be named in this context, but also the academic art agreed to this theoretical postulate, which was never actually proven, though systematic attempts to define a schizophrenic style have been made on the descriptive level, e. g. by Navratil and in more detail by Rennert .