Cited by 316Attention Deficit Hyperactivity DisorderNeural and Behavioral Psychology StudiesMind wandering and attention

The DOI matches its Crossref record; 76 of the 76 references it cites were found in a registry or an index.

A lack of default network suppression is linked to increased distractibility in ADHD

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Abstract

Heightened distractibility in participants with ADHD as indexed by increased reaction time (RT) variability has been hypothesized to be due to a failure to sufficiently suppress activation in the default attention network during cognitively demanding situations. The present study utilized fMRI to examine the relationship between intra-individual variability (IIV) in task RT and suppression of BOLD response in regions of the default network, using a working memory paradigm and two levels of control tasks. IIV was calculated separately for thirteen healthy control and twelve children with ADHD, Combined Type. Children with ADHD displayed significantly more RT variability than controls. Neural measures showed that although both groups displayed a pattern of increasing deactivation of the medial prefrontal cortex (PFC) with increasing task difficulty, the ADHD group was significantly less deactive than controls. Correlations between IIV and brain activation suggested that greater variability was associated with a failure to deactivate ventromedial PFC with increasing task difficulty. T-tests on brain activation between participants with ADHD with low versus high IIV implicated a similar region so that high variability was associated with greater activity in this region. These data provide support for the theory that increased distractibility in at least some participants with ADHD may be due to an inability to sufficiently suppress activity in the default attention network in response to increasing task difficulty.

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Crossref · 10.1016/j.brainres.2009.02.070

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  1. Schweitzer, J.B., Fassbender, C., Cortes, C.R., Tagamets, M.A., Windsor, A., Reeves, G., Carter, C.S., and Gullapalli, R. under review. Working memory processing in attention deficit hyperactivity disorder is characterized by a lack of specialization of brain function.

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Metadata

Authors
Fassbender, C., Zhang, H., Buzy, W. M., Cortes, C. R., Mizuiri, D., Beckett, L., & Schweitzer, J. B.
Affiliations
  • University of California Davis Medical Center (US)
  • University of California, Davis (US)
Venue
Brain Research
Publisher
Elsevier BV
Published
2009-06
Volume
1273
Pages
114-128
ISSN
0006-8993 (ISSN-L)
OpenAlex
W1983208632
Cited by
316
References
76
Citations by year
2026: 8 · 2025: 14 · 2024: 14 · 2023: 13 · 2022: 22 · 2021: 18 · 2020: 17 · 2019: 19 · 2018: 17 · 2017: 19 · 2016: 26 · 2015: 16 · 2014: 32 · 2013: 24 · 2012: 24
FWCI
11.51
Type
journal article
Language
en
Open access
Locations
  • Brain Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute of Mental Health (R01MH066310)
  • National Center for Research Resources (UL1RR024146)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Attention Deficit Hyperactivity Disorder
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Mind wandering and attention
Keywords
attention deficit hyperactivity disorder, distractibility, default mode network, reaction time variability, within-person variability, medial prefrontal cortex, ventromedial prefrontal cortex, neural deactivation, task difficulty, working memory, children
MeSH terms
Adolescent, Attention, Attention Deficit Disorder with Hyperactivity, Brain, Brain Mapping, Child, Cognition, Female, Gyrus Cinguli, Humans, Magnetic Resonance Imaging, Male, Memory, Short-Term, Mental Processes, Nerve Net, Neural Inhibition, Neuropsychological Tests, Reaction Time, Normal Distribution, Prefrontal Cortex

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