Traditional classifications confuse etiologic factors with symptomatic ones, making it difficult to treat psychosis.

Traditional and Henri Ey's classifications of mental illness are discussed. And the theory of neo-organo-dynamism is proposed.

The acute phase of disease may only be a temporary modification of the basic mental illness and the nature of the latter can be expressed in terms of the depth of the organic degeneration. The psychotic state consists of the basic disorder and its acute aggregative phase that is in proportion to the degree of abnormal neuronal excitations. In my classification, mental illness is classified from a normal stage N or N+ to a stage X and the degree of acute aggravation is staged from 0 to 7. By applying this classification to diagnosis, we can accurately represent the conditions of psychiatric patients that change organo-dynamically over time. At the same time, clinical comparative research, such as the effects of medicine and of biochemical changes becomes possible. The principle of the accessory pathway is also proposed. Mental pressures or ritual acts promote construction and the reorganization of neural network, and it is fixed by repeating itself. Coding to the subconsciousness of a new neural network namely bypass will be made, and it is immobilized as an accessory pathway like the bundle of Kent of the Wolff-Parkinson-White syndrome.

The theory of the neo-organo-dynamism is proposed as a minimum clinical classification of mental illness for psychiatrists.