title: Luria revisited: cognitive research in schizophrenia, past implications and future challenges.
abstract: Contemporary psychiatry is becoming more biologically oriented in the attempt to elicit a biological rationale of mental diseases. Although mental disorders comprise mostly functional abnormalities, there is a substantial overlap between neurology and psychiatry in addressing cognitive disturbances. In schizophrenia, the presence of cognitive impairment prior to the onset of psychosis and early after its manifestation suggests that some neurocognitive abnormalities precede the onset of psychosis and may represent a trait marker. These cognitive alterations may arise from functional disconnectivity, as no significant brain damage has been found. In this review we aim to revise A.R. Luria's systematic approach used in the neuropsychological evaluation of cognitive functions, which was primarily applied in patients with neurological disorders and in the cognitive evaluation in schizophrenia and other related disorders. As proposed by Luria, cognitive processes, associated with higher cortical functions, may represent functional systems that are not localized in narrow, circumscribed areas of the brain, but occur among groups of concertedly working brain structures, each of which makes its own particular contribution to the organization of the functional system. Current developments in neuroscience provide evidence of functional connectivity in the brain. Therefore, Luria's approach may serve as a frame of reference for the analysis and interpretation of cognitive functions in general and their abnormalities in schizophrenia in particular. Having said that, modern technology, as well as experimental evidence, may help us to understand the brain better and lead us towards creating a new classification of cognitive functions. In schizophrenia research, multidisciplinary approaches must be utilized to address specific cognitive alterations. The relationships among the components of cognitive functions derived from the functional connectivity of the brain may provide an insight into cognitive machinery.
authors.affiliation: National Institute of Mental Health/Prague Psychiatric Center, Topolova 748, 250 67, Klecany, Czech Republic. yuliya.zaytseva@gmail.com.|Human Science Centre and Institute of Medical Psychology, Ludwig-Maximilians-Universität, Goethestr. 31/1, 80336, Munich, Germany. yuliya.zaytseva@gmail.com.|Moscow Research Institute of Psychiatry, Poteshnaya str.3, 107076, Moscow, Russia. yuliya.zaytseva@gmail.com.
authors.forename: Yuliya
authors.initials: Y
authors.lastname: Zaytseva
authors.affiliation: Institute of Psychology,Chinese Academy of Sciences, 16 Lincui Road, 100101, Chaoyang District, Beijing, China. rckchan@psych.ac.cn.
authors.forename: Raymond C K
authors.initials: RC
authors.lastname: Chan
authors.affiliation: Human Science Centre and Institute of Medical Psychology, Ludwig-Maximilians-Universität, Goethestr. 31/1, 80336, Munich, Germany. Ernst.Poeppel@med.uni-muenchen.de.|Institute of Psychology,Chinese Academy of Sciences, 16 Lincui Road, 100101, Chaoyang District, Beijing, China. Ernst.Poeppel@med.uni-muenchen.de.|Department of Psychology, Peking University, 5Yiheyuan Road, Beijing, 100871, China. Ernst.Poeppel@med.uni-muenchen.de.
authors.forename: Ernst
authors.initials: E
authors.lastname: Pöppel
authors.affiliation: Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité-Universitätsmedizin Berlin, 10115, Berlin, Germany. andreas.heinz@charite.de.
authors.forename: Andreas
authors.initials: A
authors.lastname: Heinz
mesh_terms: D001921:Brain / Q000503:physiopathology*; D006801:Humans; D009483:Neuropsychological Tests; D012106:Research; D012559:Schizophrenia / Q000209:etiology*