Cited by 115Functional Brain Connectivity StudiesBipolar Disorder and TreatmentMental Health Research Topics

Differential brain network activity across mood states in bipolar disorder

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Brady Jr., Roscoe O., Tandon, Neeraj, Masters, Grace A., Margolis, Allison, Cohen, Bruce M., Keshavan, Matcheri, Öngür, Dost·2017·Journal of Affective Disorders

Abstract

Background This study aimed to identify how the activity of large-scale brain networks differs between mood states in bipolar disorder. The authors measured spontaneous brain activity in subjects with bipolar disorder in mania and euthymia and compared these states to a healthy comparison population. Methods 23 subjects with bipolar disorder type I in a manic episode, 24 euthymic bipolar I subjects, and 23 matched healthy comparison (HC) subjects underwent resting state fMRI scans. Using an existing parcellation of the whole brain, we measured functional connectivity between brain regions and identified significant differences between groups. Results In unbiased whole-brain analyses, functional connectivity between parietal, occipital, and frontal nodes within the dorsal attention network (DAN) were significantly greater in mania than euthymia or HC subjects. In the default mode network (DMN), connectivity between dorsal frontal nodes and the rest of the DMN differentiated both mood state and diagnosis. Limitations The bipolar groups were separate cohorts rather than subjects imaged longitudinally across mood states. Conclusions Bipolar mood states are associated with highly significant alterations in connectivity in two large-scale brain networks. These same networks also differentiate bipolar mania and euthymia from a HC population. State related changes in DAN and DMN connectivity suggest a circuit based pathology underlying cognitive dysfunction as well as activity/reactivity in bipolar mania. Altered activities in neural networks may be biomarkers of bipolar disorder diagnosis and mood state that are accessible to neuromodulation and are promising novel targets for scientific investigation and possible clinical intervention.

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Authors
Brady Jr., R. O., Tandon, N., Masters, G. A., Margolis, A., Cohen, B. M., Keshavan, M., & Öngür, D.
Affiliations
  • Beth Israel Deaconess Medical Center (US)
  • Harvard University (US)
Venue
Journal of Affective Disorders
Publisher
Elsevier BV
Published
2017-01
Volume
207
Pages
367-376
ISSN
0165-0327 (ISSN-L)
OpenAlex
W2528865389
Cited by
115
References
36
Citations by year
2025: 13 · 2024: 8 · 2023: 10 · 2022: 3 · 2021: 35 · 2020: 9 · 2019: 25 · 2018: 8 · 2017: 4
FWCI
7.85
Type
journal article
Language
en
Open access
Locations
  • Journal of Affective Disorders (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (K23MH100623, R01MH094594, R01MH078113)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Mental Health Research Topics
Keywords
bipolar disorder, mood states, mania, euthymia, large-scale brain networks, functional connectivity, resting-state fMRI, dorsal attention network, default mode network, neural markers, neuromodulation targets, cognitive impairment
MeSH terms
Adult, Affect, Attention, Bipolar Disorder, Brain, Brain Mapping, Cyclothymic Disorder, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Rest, Case-Control Studies, Young Adult

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