Cited by 3Functional Brain Connectivity StudiesTreatment of Major DepressionMental Health Research Topics

Graded changes in local functional connectivity of the cerebral cortex in young people with depression

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Jamieson, Alec J., Davey, Christopher G., Pujol, Jesus, Blanco-Hinojo, Laura, Harrison, Ben J.·2025·Psychological Medicine

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Abstract

Background: Major depressive disorder (MDD) is marked by significant changes to the local synchrony of spontaneous neural activity across various brain regions. However, many methods for assessing this local connectivity use fixed or arbitrary neighborhood sizes, resulting in a decreased capacity to capture smooth changes to the spatial gradient of local correlations. A newly developed method sensitive to classical anatomo-functional boundaries, Iso-Distant Average Correlation (IDAC), was therefore used to examine depression associated alterations to the local functional connectivity of the brain. Method: One-hundred and forty-seven adolescents and young adults with MDD and 94 healthy controls underwent a resting-state functional magnetic resonance imaging (fMRI) scan. Whole-brain functional connectivity maps of intracortical neural activity within iso-distant local areas (5–10, 15–20, and 25–30 mm) were generated to characterize local fMRI signal similarities. Results: Across all spatial distances, MDD participants demonstrated greater local functional connectivity of the bilateral posterior hippocampus, retrosplenial cortex, dorsal insula, fusiform gyrus, and supplementary motor area. Local connectivity alterations in short and medium distances (5–10 and 15–20 mm) in the mid insula cortex were additionally associated with expressive suppression use, independent of depressive symptom severity. Conclusions: Our study identified increased synchrony of the neural activity in several regions commonly implicated in the neurobiology of depression. These effects were relatively consistent across the three distances examined. Longitudinal investigation of this altered local connectivity will clarify whether these differences are also found in other age groups and if this relationship is modified by increased disease chronicity.

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  1. First, M. B., Spitzer, R. L., Gibbon, M., & Williams, J. B. W. (1997). Structured clinical interview for DSM-IV Axis I disorders: Clinician version. In P. D. Werner & T. A. Widiger (Eds.), SCID-CV.

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Authors
Jamieson, A. J., Davey, C. G., Pujol, J., Blanco-Hinojo, L., & Harrison, B. J.
Affiliations
The University of Melbourne (AU)
Corresponding author
Jamieson, Alec J.
Venue
Psychological Medicine
Published
2025
Volume
55
Pages
e88-e88
ISSN
  • 0033-2917 (ISSN-L)
  • 1469-8978
OpenAlex
W4408536140
Cited by
2
References
93
Citations by year
2026: 2
FWCI
1.14
Type
journal article
Language
en
Open access
Locations
  • Psychological Medicine (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nd)
  • Research Square (acceptedVersion, cc-by)
  • PubMed (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by)
Funders
National Health and Medical Research Council (1024570)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Mental Health Research Topics
Keywords
major depressive disorder, local functional connectivity, resting-state functional connectivity, adolescents and young adults, hippocampus, retrosplenial cortex, supplementary motor area, fusiform gyrus, expressive suppression
MeSH terms
Insular Cortex, Adolescent, Adult, Brain Mapping, Cerebral Cortex, Depressive Disorder, Major, Major Depressive Disorder, Female, Humans, Magnetic Resonance Imaging, Male, Neural Pathways, Young Adult, Connectome

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