Schizophrenia is characterized by substantial cognitive impairments which, in addition to compromising the individual's ability to perform essential cognitive functions, contribute to the thought disorder and social maladaptations of schizophrenia. These deficits are less responsive to pharmacotherapy than the positive symptoms of schizophrenia, yet may be even more disabling over the long term. This study takes advantage of a partially overlapping disorder, schizotypal personality disorder (SPD), which shares many genetic, phenomenologic and neuropsychological features with schizophrenia, but is characterized by less severe cognitive impairments and the absence of overt psychotic symptoms, to learn more about the neurobiology of the cognitive impairment in schizophrenia and possible mechanisms that may protect SPD patients from the degree of cognitive dysfunction seen in schizophrenia. Identifying such protective factors could lead to new strategies to improve cognitive functioning in schizophrenia by suggesting new pharmacologic or cognitive remediation approaches. This study uses BOLD functional magnetic resonance imaging to compare regional brain activation between patients with schizophrenia, SPD and healthy control subjects as they carry out a cognitive task utilizing visuospatial working memory (VSWM). By comparing activation in specific regions of interest in the frontal cortex, this study will test the hypothesis that schizophrenic and SPD patients have decreased activation in a region traditionally associated with visuospatial working memory in healthy subjects and that SPD patients but not schizophrenic subjects are able to recruit another frontal region to compensate for the decreased functional activity in the region utilized for VSWM in healthy subjects.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Research Project (R01)
Project #
5R01MH069947-04
Application #
7223498
Study Section
Child Psychopathology and Developmental Disabilities Study Section (CPDD)
Program Officer
Meinecke, Douglas L
Project Start
2004-07-01
Project End
2010-04-30
Budget Start
2007-05-01
Budget End
2010-04-30
Support Year
4
Fiscal Year
2007
Total Cost
$361,613
Indirect Cost
Name
Mount Sinai School of Medicine
Department
Psychiatry
Type
Schools of Medicine
DUNS #
078861598
City
New York
State
NY
Country
United States
Zip Code
10029
Lener, Marc S; Wong, Edmund; Tang, Cheuk Y et al. (2015) White matter abnormalities in schizophrenia and schizotypal personality disorder. Schizophr Bull 41:300-10