Contradictory results in schizophrenia research are generally explained as being due to genetic heterogeneity and multiple factor heredity in relationship to manifold environmental factors. The book reports a short overview of all relevant twin studies on schizophrenic psychoses and provides data and case histories on a systematic twin study based on a polydiagnostic approach carried out by two independently working psychiatrists. In addition to the internationally applied operational diagnostic systems of DSM-III-R and ICD 10 Leonhard's subclassification of schizophrenic psychoses was used....

This volume contains the proceedings of the symposium Pathochemical Markers in Major Psychoses, held in Vienna in July 1983. The development of biological markers in psychiatric diseases, par ticularly in the field of neurochemistry, has made substantial progress during recent years although the multiple mechanisms of mental illness are still not fully understood. The greatest contribution has come through the development of new therapeutic agents that not only pro vide invaluable help for psychiatric patients but also serve as chemical tools for the investigation of the biological mechanisms...