Cited by 70Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersNeuroendocrine regulation and behavior

A combined clinical, neuropsychological, and neuroanatomical study of adults with high functioning autism

Boucher, Jill, Cowell, Patricia, Howard, Matthew, Broks, Paul, Farrant, Annette, Roberts, Neil, Mayes, Andrew·2005·Cognitive Neuropsychiatry

Abstract

INTRODUCTION: Three hypotheses concerning associations between neuroanatomical abnormalities, neuropsychological impairments, and the behavioural manifestations of autism were investigated. The primary hypothesis was that the social interaction impairments diagnostic of autism are associated with deficits of socioemotional perception and abnormalities of the amygdala. One subsidiary hypothesis was that the learning and language impairments that occur in less able individuals with autism are associated with impaired memory, and with abnormalities of hippocampal regions. A second subsidiary hypothesis was that the repetitive behaviour diagnostic of autism is associated with executive deficits and with abnormalities of the prefrontal cortex. Associations between the neuroanatomical regions investigated were also examined. METHODS: Ten adult males with high functioning autism (HFA) were compared with 10 healthy controls matched for age, sex, verbal and nonverbal ability. Hypothesis-driven structural MRI and neuropsychological tests were used to collect neuroanatomical and neuropsychological data on all subjects. A version of the Wing Autism Diagnostic Interview Checklist was used to collect clinical data on the HFA subjects. RESULTS: Strong convergent evidence in support of the amygdala hypothesis was obtained, and preliminary support for the hippocampal/parahippocampal hypothesis. No clear evidence was obtained in support of the prefrontal hypothesis. Patterns of associations amongst volume measures within and between medial temporal and prefrontal regions suggest stronger within-region and weaker between-region associations in the HFA group compared with controls. CONCLUSIONS: These findings are discussed in terms of a model of autism in which selective abnormalities of the amygdala and hippocampus (in all cases) and of the parahippocampal gyrus (in lower functioning cases) are implicated, and in which a disruption of coordinated limbic and prefrontal activity may be critical.

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Crossref · 10.1080/13546800444000038

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Authors
Boucher, J., Cowell, P., Howard, M., Broks, P., Farrant, A., Roberts, N., & Mayes, A.
Affiliations
  • University of Warwick (GB)
  • University of Sheffield (GB)
  • University of Liverpool (GB)
  • University of Plymouth (GB)
  • Addenbrooke's Hospital (GB)
Venue
Cognitive Neuropsychiatry
Published
2005-06
Volume
10
Issue
3
Pages
165-213
ISSN
  • 1354-6805 (ISSN-L)
  • 1464-0619
OpenAlex
W1973570456
Cited by
69
References
0
Citations by year
2026: 1 · 2024: 2 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 3 · 2018: 2 · 2017: 4 · 2016: 4 · 2015: 9 · 2014: 3 · 2013: 4 · 2012: 8
FWCI
2.14
Type
journal article
Language
en
Open access
closed
Locations
  • Cognitive Neuropsychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • Research Explorer (The University of Manchester) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
Keywords
high-functioning autism, amygdala, hippocampus, parahippocampal gyrus, prefrontal cortex, social interaction deficits, repetitive behavior, executive function, memory impairment, limbic system, medial temporal lobe, brain structure

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