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Dopamine and psychosis: theory, pathomechanisms and intermediate phenotypes Tost H; Alam T; Meyer-Lindenberg ANeurosci Biobehav Rev 2010[Apr]; 34 (5): 689-700Schizophrenia is a chronic, severe, and disabling brain disorder arising from the adverse interaction of predisposing risk genes and environmental factors. The psychopathology is characterized by a wide array of disturbing cognitive, emotional, and behavioral symptoms that interfere with the individual's capacity to function in society. Contemporary pathophysiological models assume that psychotic symptoms are triggered by a dysregulation of dopaminergic activity in the brain, a theory that is tightly linked to the serendipitous discovery of the first effective antipsychotic agents in the early 1950s. In recent years, the availability of modern neuroimaging techniques has significantly expanded our understanding of the key mediator circuits that bridge the gap between genetic susceptibility and clinical phenotype. This paper discusses the pathophysiological concepts, molecular mechanisms and neuroimaging evidence that link psychosis to disturbances in dopamine neurotransmission.|Animals[MESH]|Brain/metabolism[MESH]|Dopamine/genetics/*metabolism[MESH]|Humans[MESH]|Mental Disorders/genetics/*metabolism[MESH]|Models, Neurological[MESH]|Phenotype[MESH] |
