In an article of 1920 entitled "Die Erscheinungsformen des Irreseins," published in Kraepelin's phase of theoretical maturity, this great German scholar presented a rereading of his thinking on psychopathology, considering that clinical manifestations of mental diseases are never direct expressions of underlying pathogenic processes. Manifestations depend on a complex interaction with the subject in his or her history during which changes have been installed and inscribed. © 2009 Associação Universitária de Pesquisa em Psicopatologia Fundamental.121161166Angst, J., Psychiatric diagnoses: The weak component of modern research (2007) World Psychiatry, 6 (2), pp. 94-95. , JunBercherie, P., (1991) Histoire et structure du savoir psychiatrique: les fondements de la clinique - I, , Tournai: Editions UniversitairesBerrios, G., (1996) The history of the mental symptoms, , Cambridge: Cambridge Univ. PressDalgalarrondo, P., A psiquiatria transcultural de Kraepelin (1996) Civilização e loucura: uma introdução à história da etnopsiquiatria, pp. 83-93. , São Paulo: LemosGarrabe, J., (1992) Histoire de la schizophénie, , Paris: SeghersKraepelin, E., (1984) Introduction à la psychiatrie clinique, , Paris: NavarinKraepelin, E., (1996) La demencia precoz, 1-2. , Buenos Aires: Polemos EditorialPereira, M.E.C., Kraepelin e a criação do conceito de "Demência precoce (2001) Revista Latinoamericana de Psicopatologia Fundamental, 4 (4), pp. 126-129. , São Paulo, dez(1992) The clinical approach in psychiatry, , PICHOT, P.REIN, W. (Eds.)., Le PlessisRobinson: SynthélaboPostel, J., Quetel, C., (1983) Nouvelle histoire de la psychiatrie, , (Orgs.), Toulouse: PrivatStagnaro, J.C., (1996) Presentation a KRAEPELIN, E. La demencia precoz, 1, pp. 7-23. , Buenos Aires: Polemos Editorial