title: Comparing prefrontal gray and white matter contributions to intelligence and decision making in schizophrenia and healthy controls.
abstract: The authors examined the relationship between neuropsychological performance and MRI of the orbital frontal cortex (OFC) and diffusion tensor imaging (DTI) of the cingulum bundle (CB) within groups of patients with schizophrenia and healthy subjects. The authors analyzed data from subjects, who had participated in prior MRI, DTI, and neuropsychological studies (Nakamura et al., 2008; Nestor et al., 2008). In comparison to healthy subjects, patients showed the expected reductions across CB fractional anisotropy (white matter) and OFC gray matter volume as well as lower neuropsychological scores. In addition, in comparison to healthy subjects, patients showed a very different pattern of functional-anatomical correlates. For patients, CB white matter but not OFC gray matter correlated with various aspects of intelligence, including general abilities and working memory. For controls, OFC gray matter but not CB white matter correlated with scores on tests of intelligence and decision making. These results point to the potentially important role of CB white matter in the neuropsychological disturbance in schizophrenia.
authors.affiliation: Department of Psychology, University of Massachusetts, Boston and Clinical Neuroscience Division, Laboratory of Neuroscience, Boston VA Healthcare System-Brockton Division, Brockton, Massachusetts 02125-3393, USA. paul.nestor@umb.edu
authors.forename: Paul G
authors.initials: PG
authors.lastname: Nestor
authors.forename: Marek
authors.initials: M
authors.lastname: Kubicki
authors.forename: Motoaki
authors.initials: M
authors.lastname: Nakamura
authors.forename: Margaret
authors.initials: M
authors.lastname: Niznikiewicz
authors.forename: Robert W
authors.initials: RW
authors.lastname: McCarley
authors.forename: Martha E
authors.initials: ME
authors.lastname: Shenton
mesh_terms: D000293:Adolescent; D000328:Adult; D001931:Brain Mapping; D003657:Decision Making / Q000502:physiology*; D056324:Diffusion Tensor Imaging / Q000379:methods; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007360:Intelligence / Q000502:physiology*; D007361:Intelligence Tests; D008297:Male; D008875:Middle Aged; D009413:Nerve Fibers, Myelinated / Q000473:pathology*; D009483:Neuropsychological Tests; D017397:Prefrontal Cortex / Q000473:pathology*; D012559:Schizophrenia / Q000473:pathology* / Q000503:physiopathology; D012565:Schizophrenic Psychology; D013223:Statistics as Topic; D055815:Young Adult