Cited by 578Functional Brain Connectivity StudiesAdvanced Neuroimaging Techniques and ApplicationsAdvanced MRI Techniques and Applications

Aging and functional brain networks

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Tomasi, D, Volkow, N D·2012·Molecular Psychiatry

Abstract

Aging is associated with changes in human brain anatomy and function and cognitive decline. Recent studies suggest the aging decline of major functional connectivity hubs in the 'default-mode' network (DMN). Aging effects on other networks, however, are largely unknown. We hypothesized that aging would be associated with a decline of short- and long-range functional connectivity density (FCD) hubs in the DMN. To test this hypothesis, we evaluated resting-state data sets corresponding to 913 healthy subjects from a public magnetic resonance imaging database using functional connectivity density mapping (FCDM), a voxelwise and data-driven approach, together with parallel computing. Aging was associated with pronounced long-range FCD decreases in DMN and dorsal attention network (DAN) and with increases in somatosensory and subcortical networks. Aging effects in these networks were stronger for long-range than for short-range FCD and were also detected at the level of the main functional hubs. Females had higher short- and long-range FCD in DMN and lower FCD in the somatosensory network than males, but the gender by age interaction effects were not significant for any of the networks or hubs. These findings suggest that long-range connections may be more vulnerable to aging effects than short-range connections and that, in addition to the DMN, the DAN is also sensitive to aging effects, which could underlie the deterioration of attention processes that occurs with aging.

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  1. [37]Changeux J Neuronal man Princeton University Press New Jersey 1997

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Authors
Tomasi, D., & Volkow, N. D.
Affiliations
  • National Institute on Alcohol Abuse and Alcoholism (US)
  • National Institute on Drug Abuse (US)
Corresponding author
Tomasi, D
Venue
Molecular Psychiatry
Published
2011-07-05
Volume
17
Issue
5
Pages
549-558
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W1969845534
Cited by
578
References
61
Citations by year
2026: 19 · 2025: 26 · 2024: 34 · 2023: 39 · 2022: 44 · 2021: 56 · 2020: 49 · 2019: 46 · 2018: 39 · 2017: 45 · 2016: 49 · 2015: 35 · 2014: 48 · 2013: 29 · 2012: 15
FWCI
15.60
Type
journal article
Language
en
Open access
Locations
  • Molecular Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (Z99‐AA999999)
  • National Institute on Alcohol Abuse and Alcoholism (2R01AA09481, R01AA009481)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
Keywords
brain aging, functional connectivity density, default mode network, dorsal attention network, somatosensory network, subcortical network, sex differences, cognitive decline, resting-state functional connectivity
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Aging, Brain Mapping, Child, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Middle Aged, Neural Pathways, Rest, Sex Characteristics, Databases, Factual

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