Neuropsychological Impairments in Schizophrenia and Psychotic Bipolar Disorder: Findings from the Bipolar-Schizophrenia Network on Intermediate Phenotypes (B-SNIP) Study
S. Kristian Hill,James L. Reilly,Richard S.E. Keefe,James M. Gold,Jeffrey R. Bishop,Elliot S. Gershon,Carol A. Tamminga,Godfrey D. Pearlson,Matcheri S. Keshavan,John A. Sweeney +9 more
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TLDR
Robust cognitive deficits are present and familial in schizophrenia and psychotic bipolar disorder and Severity of cognitive impairments across psychotic disorders was consistent with a continuum model, in which more prominent affective features and less enduring psychosis were associated with less cognitive impairment.Abstract:
ObjectiveFamilial neuropsychological deficits are well established in schizophrenia but remain less well characterized in other psychotic disorders. This study from the Bipolar-Schizophrenia Network on Intermediate Phenotypes (B-SNIP) consortium 1) compares cognitive impairment in schizophrenia and bipolar disorder with psychosis, 2) tests a continuum model of cognitive dysfunction in psychotic disorders, 3) reports familiality of cognitive impairments across psychotic disorders, and 4) evaluates cognitive impairment among nonpsychotic relatives with and without cluster A personality traits.MethodParticipants included probands with schizophrenia (N=293), psychotic bipolar disorder (N=227), schizoaffective disorder (manic, N=110; depressed, N=55), their first-degree relatives (N=316, N=259, N=133, and N=64, respectively), and healthy comparison subjects (N=295). All participants completed the Brief Assessment of Cognition in Schizophrenia (BACS) neuropsychological battery.ResultsCognitive impairments among...read more
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Working Memory in Unaffected Relatives of Patients With Schizophrenia: A Meta-Analysis of Functional Magnetic Resonance Imaging Studies
TL;DR: The results suggest that the familial risk of schizophrenia is expressed in changes in neural activation in the unaffected relatives in the cortical-subcortical working memory network that includes, but is not restricted to the middle prefrontal cortex.
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Examining cognition across the bipolar/schizophrenia diagnostic spectrum.
Amy Lynham,Leon Hubbard,Katherine E. Tansey,Marian L. Hamshere,Sophie E. Legge,Michael John Owen,Ian Jones,James T.R. Walters +7 more
TL;DR: Cognitive impairments represent a symptom dimension that cuts across traditional diagnostic boundaries and is consistent with a spectrum of deficits from bipolar disorder to schizoaffective disorder bipolar type, to schizophrenia and schizoAffective disorder depressive type.
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