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Neuropsychopharmacology. 2011 Sep;36(10):2009-17. doi: 10.1038/npp.2011.88. Epub 2011 Jun 8.

Abnormal medial prefrontal cortex resting-state connectivity in bipolar disorder and schizophrenia.

Author information

1
Department of Brain and Cognitive Sciences, Poitras Center for Affective Disorders Research, McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. xiaoqian@mit.edu

Abstract

Bipolar disorder and schizophrenia overlap in symptoms and may share some underlying neural substrates. The medial prefrontal cortex (MPFC) may have a crucial role in the psychophysiology of both these disorders. In this study, we examined the functional connectivity between MPFC and other brain regions in bipolar disorder and schizophrenia using resting-state functional magnetic resonance imaging (fMRI). Resting-state fMRI data were collected from 14 patients with bipolar disorder, 16 patients with schizophrenia, and 15 healthy control subjects. Functional connectivity maps from the MPFC were computed for each subject and compared across the three groups. The three groups showed distinctive patterns of functional connectivity between MPFC and anterior insula, and between MPFC and ventral lateral prefrontal cortex (VLPFC). The bipolar disorder group exhibited positive correlations between MPFC and insula, and between MPFC and VLPFC, whereas the control group exhibited anticorrelations between these regions. The schizophrenia group did not exhibit any resting-state correlation or anticorrelation between the MPFC and the VLPFC or insula. In contrast, neither patient group exhibited the significant anticorrelation between dorsal lateral prefrontal cortex (DLPFC) and MPFC that was exhibited by the control group. The decoupling of DLPFC with MPFC in bipolar disorder and schizophrenia is consistent with the impaired executive functioning seen in these disorders. Functional connectivity between MPFC and insula/VLPFC distinguished bipolar disorder from schizophrenia, and may reflect differences in the affective disturbances typical of each illness.

PMID:
21654735
PMCID:
PMC3158318
DOI:
10.1038/npp.2011.88
[Indexed for MEDLINE]
Free PMC Article
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