Cited by 156Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersFunctional Brain Connectivity Studies

Autism: The first firm finding = underconnectivity?

Hughes, John R.·2007·Epilepsy & Behavior

Abstract

In January 2005, J.R. Hughes and M. Melyn published an electroencephalographic study on autistic children and found 46% with seizures and also a relatively high prevalence of 20% with epileptiform discharges but without any clinical seizures (Clin EEG Neurosci 2005;36:15-20). Because the discharges have always been viewed as focal events and the clinical seizures as requiring spread, the conclusion from these data was that children with autism may have a deficiency of corticocortical fibers. Since that time many MRI and functional MRI studies have been published confirming that one of the first findings in this devastating condition is underconnectivity. Specific findings are the thinning of the corpus callosum and the reduced connectivity, especially with the frontal areas and also the fusiform face area. Other studies involving positron emission tomography scans, magnetoencephalography, and perception have added to the evidence of underconnectivity. One final point is the initial overgrowth of white matter in the first 2 years of life in autistic children, followed later by arrested growth, resulting in aberrant connectivity; myelination of white matter will likely be significant in the etiology of autism.

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Crossref · 10.1016/j.yebeh.2007.03.010

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  • Models of ASD as a brain dysconnection syndrome have emerged from analyses of abnormalities in cortico-cortical connections.

    “Models of ASD as a brain dysconnection syndrome (8-13) have emerged from analyses of abnormalities in cortico-cortical connections.”

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Authors
Hughes, J. R.
Affiliations
University of Illinois Chicago (US)
Corresponding author
Hughes, John R.
Venue
Epilepsy & Behavior
Publisher
Elsevier BV
Published
2007-08
Volume
11
Issue
1
Pages
20-24
ISSN
1525-5050 (ISSN-L)
OpenAlex
W2021243932
Cited by
156
References
53
Citations by year
2025: 3 · 2024: 7 · 2023: 4 · 2022: 4 · 2021: 4 · 2020: 7 · 2019: 4 · 2018: 4 · 2017: 2 · 2016: 13 · 2015: 10 · 2014: 9 · 2013: 11 · 2012: 12
FWCI
1.06
Type
journal article
Language
en
Open access
closed
Locations
  • Epilepsy & Behavior (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
Keywords
autism spectrum disorder, corticocortical connectivity, corpus callosum thinning, epileptiform discharges, myelination, fusiform face area, functional MRI, positron emission tomography, magnetoencephalography, EEG
MeSH terms
Autistic Disorder, Cerebral Cortex, Child, Corpus Callosum, Electroencephalography, Face, Humans, Magnetic Resonance Imaging, Nerve Fibers, Myelinated, Neural Pathways, Organ Size, Pattern Recognition, Visual

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