Resting state corticolimbic connectivity abnormalities in unmedicated bipolar disorder and unipolar depression

Amit Anand, Yu Li, Yang Wang, Mark J. Lowe, Mario Dzemidzic

Research output: Contribution to journalArticle

254 Scopus citations

Abstract

This study for the first time investigated resting state corticolimbic connectivity abnormalities in unmedicated bipolar disorder (BD) and compared them with findings in healthy controls and unipolar major depressive disorder (MDD) patient groups. Resting state correlations of low frequency BOLD fluctuations (LFBF) in echoplanar functional magnetic resonance (fMRI) data were acquired from a priori defined regions of interests (ROIs) in the pregenual anterior cingulate cortex (pgACC), dorsomedial thalamus (DMTHAL), pallidostriatum (PST) and amygdala (AMYG), to investigate corticolimbic functional connectivity in unmedicated BD patients in comparison to healthy subjects and MDD patients. Data were acquired from 11 unmedicated BD patients [six manic (BDM) and five depressed (BDD)], and compared with data available from 15 unmedicated MDD and 15 healthy subjects. BD patients had significantly decreased pgACC connectivity to the left and right DMTHAL, similar to findings seen in MDD. Additionally, BD patients had decreased pgACC connectivity with the left and right AMYG as well as the left PST. An exploratory analysis revealed that both BDD and BDM patients had decreased connectivity between the pgACC and DMTHAL. The results of the study indicate a common finding of decreased corticolimbic functional connectivity in different types of mood disorders.

Original languageEnglish (US)
Pages (from-to)189-198
Number of pages10
JournalPsychiatry Research - Neuroimaging
Volume171
Issue number3
DOIs
StatePublished - Mar 31 2009

Keywords

  • Bipolar disorder
  • Brain imaging
  • Depression
  • fMRI
  • Resting state connectivity

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Radiology Nuclear Medicine and imaging
  • Neuroscience (miscellaneous)

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