PubMed · 12532914
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2003. Bypass without missing a beat.. https://pubmed.ncbi.nlm.nih.gov/12532914/
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Schizophrenia is characterized by a global cognitive impairment, with varying degrees of deficit in all ability domains. Since genetic factors are important in the etiology of schizophrenia we investigated whether parents of schizophrenic patients also show cognitive deficits, particularly on those cognitive ability domains that are most severely affected in patients. Both biological parents of 37 patients with schizophrenia (N=74 subjects) and 28 comparable healthy married control couples (N=56 subjects) were included. A comprehensive and standardized cognitive battery was used including tests measuring verbal memory, executive functioning, language, attention, and psychomotor functioning. Parents of patients differed from control couples on those cognitive constructs that are generally considered to be most impaired in schizophrenic patients, i.e. global verbal memory, bilateral motor skill, continuous performance, and word fluency. In addition, parents differed significantly from control couples on some other cognitive constructs on which patients show a smaller but also significant difference compared to healthy controls, i.e. unilateral motor skill and digit span. Results suggest that the cognitive constructs on which patients show relatively most severe impairment may prove suitable as endophenotypic markers in schizophrenia.
OBJECTIVE: To identify neuropsychological domains, including fine motor dexterity, that are related to social functioning in schizophrenia. METHOD: Thirty-six DSM-IV schizophrenic subjects were assessed using the Purdue Pegboard test, the Modified Wisconsin Card Sorting test, the Tower of London, Schwartz' Reaction Time and Wechsler's Associate Learning and Digit Span tests. Social functioning was measured by the Social and Occupational Functional Assessment Scale. RESULTS: Univariate regression analyses showed that the Purdue Pegboard, the Modified Card Sorting test, the Tower of London and Wechsler's Associate Learning subtest were significantly linked to social functioning. The best fitting multivariate model to explain social functioning included fine motor dexterity and executive functioning. CONCLUSION: Various neuropsychological measures correlated to social functioning, the correlation involving fine motor dexterity being the strongest one. Future studies of the prediction of social functioning in schizophrenia should include fine motor dexterity.
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