[Art of patients with endogenous psychosis as an approach to differential diagnosis]

If it is desired to evaluate the products of artistic activity of subjects of endogenous psychosis, then new aspects arise from an attempt to find special forms of drawing and painting for special forms of endogenous psychosis instead of generally speaking of schizophrenia and manic-depressive disease. Some information has been obtained in this connection. Catatonic iterations can be seen to be reflected in pictures. Thought disorders in subjects of paraphrenia are often seen to be mirrored in products of artistic activity. The "disorder of speech" of subjects of cataphasia is sometimes reflected in a "disorder of the drawing or painting" produced. Expansive paraphrenia patients are fond of painting in order to give themselves airs. Happiness psychosis, because of the ecstatic emotions associated therewith, often involves a direct drive to do artistic work.