Altered resting-state functional connectivity in late-life depression: A cross-sectional study

Harris A. Eyre, Hongyu Yang, Amber M. Leaver, Kathleen Van Dyk, Prabha Siddarth, Natalie St Cyr, Katherine Narr, Linda Ercoli, Bernhard T. Baune, Helen Lavretsky*

*Corresponding author for this work

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Background Disrupted brain connectivity is implicated in the pathophysiology of late-life depression (LLD). There are few studies in this area using resting-state functional magnetic resonance imaging (rs-fMRI). In this pilot case-control study, we compare rs-fMRI data between age-matched depressed and non-depressed older adults. Methods Older participants (≥55 years) with current major depressive disorder (MDD) were recruited to participate in an ongoing study of LLD, and were compared to the age-matched, non-depressed controls. Rs-fMRI data were collected using a 3-Tesla MRI system. In this study, a data-driven approach was chosen and an independent component analysis (ICA) was performed. Results Seventeen subjects with MDD were compared to 31 controls. The depressed group showed increased connectivity in three main networks compared to the controls (p(corr)<0.05), including connectivity between the default mode network (DMN) and the posterior superior temporal sulcus (pSTS). Increased connectivity was also observed within the visual network in the medial, lateral and ventral regions of the occipital lobes, and within the auditory network throughout the right superior temporal cortex. Conclusion This data-driven, pilot study finds patterns of increased connectivity that may be unique to LLD in the DMN, as well as visual and auditory networks. The functional implications of this aberrant connectivity remains to be determined. These findings should be further explored in larger samples.

Original languageEnglish (US)
Article number7693
Pages (from-to)126-133
Number of pages8
JournalJournal of Affective Disorders
Volume189
DOIs
StatePublished - Jan 1 2016

Keywords

  • Functional connectivity
  • Geriatric depression
  • Late-life
  • Neuroimaging
  • fMRI

ASJC Scopus subject areas

  • Clinical Psychology
  • Psychiatry and Mental health

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    Eyre, H. A., Yang, H., Leaver, A. M., Van Dyk, K., Siddarth, P., Cyr, N. S., Narr, K., Ercoli, L., Baune, B. T., & Lavretsky, H. (2016). Altered resting-state functional connectivity in late-life depression: A cross-sectional study. Journal of Affective Disorders, 189, 126-133. [7693]. https://doi.org/10.1016/j.jad.2015.09.011