Cited by 527Autism Spectrum Disorder ResearchGenetics and Neurodevelopmental DisordersChild Nutrition and Feeding Issues

Neuropathological findings in autism

Palmen, S. J. M. C.·2004·Brain

Abstract

Autism is currently viewed as a largely genetically determined neurodevelopmental disorder, although its underlying biological causes remain to be established. In this review, we examine the available neuropathological literature on autism and discuss the findings that have emerged. Classic neuropathological observations are rather consistent with respect to the limbic system (nine of 14 studied cases showed increased cell packing density and smaller neuronal size), the cerebellum (21 of 29 studied cases showed a decreased number of Purkinje cells, and in all of five cases that were examined for age-related morphological alterations, these changes were found in cerebellar nuclei and inferior olive) and the cerebral cortex (>50% of the studied cases showed features of cortical dysgenesis). However, all reported studies had to contend with the problem of small sample sizes, the use of quantification techniques not free of bias and assumptions, and high percentages of autistic subjects with comorbid mental retardation (at least 70%) or epilepsy (at least 40%). Furthermore, data from the limbic system and on age-related changes lack replication by independent groups. It is anticipated that future neuropathological studies hold great promise, especially as new techniques such as design-based stereology and gene expression are increasingly implemented and combined, larger samples are analysed, and younger subjects free of comorbidities are investigated.

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Crossref · 10.1093/brain/awh287

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Authors
Palmen, S. J. M. C.
Affiliations
University Medical Center Utrecht (NL)
Corresponding author
Palmen, S. J. M. C.
Venue
Brain
Published
2004-11-10
Volume
127
Issue
12
Pages
2572-2583
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
OpenAlex
W2143865775
Cited by
527
References
114
Citations by year
2026: 9 · 2025: 11 · 2024: 14 · 2023: 15 · 2022: 9 · 2021: 20 · 2020: 26 · 2019: 10 · 2018: 13 · 2017: 17 · 2016: 31 · 2015: 22 · 2014: 32 · 2013: 37 · 2012: 46
FWCI
12.76
Type
journal article
Language
en
Open access
closed
Locations
  • Brain (publishedVersion)
  • PubMed (publishedVersion)
  • RWTH Publications (RWTH Aachen) (submittedVersion)
Funders
  • National Institutes of Health (n01hd013138-010)
  • National Institute of Mental Health (MH66392, P50MH066392)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (N01 HD 13138)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Health Sciences › Medicine › Psychiatry and Mental health › Child Nutrition and Feeding Issues
Keywords
autism spectrum disorder, neuropathology, limbic system, cerebellum, Purkinje cells, cortical dysgenesis, neuron size, epilepsy, design-based stereology, gene expression
MeSH terms
Adolescent, Adult, Autistic Disorder, Brain, Cerebellum, Cerebral Cortex, Child, Humans, Limbic System, Magnetic Resonance Imaging

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