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Neurocognition in Schizophrenia

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Behavioral Neurobiology of Schizophrenia and Its Treatment

Part of the book series: Current Topics in Behavioral Neurosciences ((CTBN,volume 4))

Abstract

Neuropsychological deficits among schizophrenia patients have been consistently documented in research over the past 20 years and are reviewed in this chapter. Discussion of general abilities is presented as a background and is followed by analysis of functioning in specific cognitive domains. Overall intellectual deficits are indicated by results from both general intelligence tests and composite test battery scores. Within specific cognitive domains, effect size differences are noted in numerous areas, including attention, with indications that working memory is affected more severely than simple attention, likely due to inclusion of an executive component in such tasks. There is also evidence of slowed processing speed among schizophrenia patients, likely contributing to deficits in other domains which rely on rapid and efficient assimilation of information. Executive impairments have been found on tests assessing set-shifting abilities, selective attention, and inhibition of inappropriate responses. Learning and memory deficits have been demonstrated extensively, with some evidence that recall of verbal material is more affected than recall of visual information, and that recognition abilities are comparatively less impaired than recall for both modalities. Receptive and expressive language abilities are compromised in schizophrenia patients, as well as visual perceptual, constructional, and fine motor skills. Social cognition is an area of particular importance due to its relevance to functional outcome. Deficits in expression and recognition of facial and prosodic affect have been demonstrated, although subjective experience of emotion appears to be relatively well preserved. Neuropsychological deficits described in this review appear to generally remain stable throughout adulthood, supporting neurodevelopmental, rather than neurodegenerative, models of the illness. Finally, cognitive deficits are increasingly used as endophenotypes, which is likely an important direction of future research.

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Authors and Affiliations

  1. Schizophrenia Research Center, Neuropsychiatry Section, Department of Psychiatry, University of Pennsylvania School of Medicine, 10th Floor, Gates Building, 3400 Spruce Street, Philadelphia, PA, 19104, USA

    Solomon Kalkstein, Irene Hurford & Ruben C. Gur

  2. Philadelphia Veterans Affairs Medical Center, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104-6021, USA

    Solomon Kalkstein, Irene Hurford & Ruben C. Gur

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  1. Solomon Kalkstein
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  2. Irene Hurford
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  3. Ruben C. Gur
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Correspondence to Solomon Kalkstein .

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  1. , Dept. of Psychiatry - MC 0804, University of San Diego, Gilman Drive 9500, La Jolla, 92093, USA

    Neal R. Swerdlow

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Kalkstein, S., Hurford, I., Gur, R.C. (2010). Neurocognition in Schizophrenia. In: Swerdlow, N. (eds) Behavioral Neurobiology of Schizophrenia and Its Treatment. Current Topics in Behavioral Neurosciences, vol 4. Springer, Berlin, Heidelberg. https://doi.org/10.1007/7854_2010_42

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