[Bertalan Petho's two studies on a schizophrenic composer's music sheets].

This essay presents two studies of Bertalan Petho's rich and diverse oeuvre. The first one (published in 1967) analyzed a schizophrenic composer-patient's composition created during the acute phase of schizophrenia and consi - dered the hiatus discursivitatis as one of the main characteristics of the pathology of expression in his musical works. The second study is the patients' catamnestic follow-up after 13 years. In that late, chronic, residual phase of schizophrenia with overwhelmingly negative symptoms, the mannieristic catatonia dominated the clinical feature, as well as the pathology of musical expression. These two studies build a bridge between music and psychopathology in a way unique in the literature and greatly demonstrate the utilization of musical expression in the phenomenological approach of schizophrenia. Due to Berta - lan Petho's high level of musical literacy, his knowledge of music theory and harmony, we have an insight through a specific window into the severe self-disturbance and alienisation determining the schizophrenic world of experience. Petho's approach is still relevant today: it fits conceptually to the most novel phenome-nological framework of the psychopathology of schizophrenia, i.e. to the ipseity-hyperreflexivity model, as well as to theories that draw a parallel between the schizophrenic reification and alienisation and the 20th-century modernism.