Schizophrenic and Affective Psychosis: Twin and Family Studies

摘要: The relative role of genetic and environmental factors in the etiology schizophrenia is not entirely known. This review will cover research efforts directed toward clarifying an issue. Kraepelin’s early classification psychoses 1899 according to descriptive prognostic terms was into two major groups psychoses: dementia praecox, dementing irrecoverable insanity manic-depressive psychosis, a periodic recoverable psychosis (1). With this system could begin determining etiologic factors. Bleuler conceived group no known organic origin which 1911 he labeled as schizophrenia. In placed but also psychoses, all shared common set primary symptoms including disturbance association, affect volition, varied number secondary such delusions hallucinations.