Evidence for a cerebellar role in reduced exploration and stereotyped behavior in autism
Abstract
Background Although limited environmental exploration in autism is an obvious behavioral feature and may be a manifestation of "restricted interests" as described in DSM-IV criteria, there have been no behavioral or neurobiological studies of this important aspect of the disorder. Given consistent reports of cerebellar abnormality in autism, combined with animal research showing a relationship between exploration and the cerebellum, this study aimed to test the possible link between cerebellar abnormality and exploration in autism.Methods The relationship between visuospatial exploration, stereotyped motor movements, and magnetic resonance imaging measures of the cerebellar vermis, whole brain volume, and frontal lobes in 14 autistic and 14 normal children was investigated. Children were exposed to a large room with several exploration containers and instructed to play. Exploration behavior was videotaped and scored for percentage of time engaged in exploration, number of containers explored, as well as stereotyped movements.Results Children with autism spent significantly less time in active exploration and explored fewer containers overall than normal children. Measures of decreased exploration were significantly correlated with the magnitude of cerebellar hypoplasia of vermal lobules VI-VII in the autistic children, but no relationship to vermis size was found with normal control children. Further, measures of rates of stereotyped behavior were significantly negatively correlated with area measures of cerebellar vermis lobules VI-VII and positively correlated with frontal lobe volume in the autism sample.Conclusions Reduced environmental exploration and repetitive behavior may have particularly important developmental consequences for children with autism because it may lead them to miss learning opportunities that fall outside their scope of interest. Our findings represent the first documented link between the restricted range of interests and stereotyped behaviors pathognomonic of autism and particular neuroanatomic sites.
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There is reduced activity in the cerebellum of individuals with autism spectrum disorder compared to healthy controls, highlighting the role of the cerebellum in both predictive inference and autism symptoms.
“Furthermore, there is reduced activity in the cerebellum of individuals with ASD compared to HC, highlighting the role of the cerebellum in both predictive inference (Popa and Ebner, 2019; Sokolov et al., 2017) and autism symptoms (Pierce and Courch esne, 2001).”
From Predictive coding in neuropsychiatric disorders: a systematic transdiagnostic review. (2025) · cites this paper as Pierce and Courchesne, 2001
The degree of volumetric differences in posterior cerebellar vermis and Rcrus1 correlates with ASD symptom severity.
“the degree of volumetric differences in these areas correlates with ASD symptom severity6,7”
From Regulation of autism-relevant behaviors by cerebellar-prefrontal cortical circuits (2020) · cites this paper as [6]
The posterior cerebellar vermis is implicated in ASD.
“One cerebellar domain that has been implicated in ASD is the posterior cerebellar vermis6,7,32.”
From Regulation of autism-relevant behaviors by cerebellar-prefrontal cortical circuits (2020) · cites this paper as [6]
Alterations in posterior vermis volume correlate with repetitive behaviors.
“Alterations in posterior vermis volume correlate with repetitive behaviors6,33”
From Regulation of autism-relevant behaviors by cerebellar-prefrontal cortical circuits (2020) · cites this paper as [6]
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- Authors
- Pierce, K., & Courchesne, E.
- Affiliations
- University of California System (US)
- Corresponding author
- Pierce, Karen
- ORCID
- Pierce, Karen
- Venue
- Biological Psychiatry
- Publisher
- Elsevier BV
- Published
- 2001-04
- Volume
- 49
- Issue
- 8
- Pages
- 655-664
- ISSN
- 0006-3223 (ISSN-L)
- OpenAlex
- W1967127965
- Cited by
- 464
- References
- 43
- Citations by year
- 2026: 5 · 2025: 13 · 2024: 17 · 2023: 12 · 2022: 20 · 2021: 23 · 2020: 13 · 2019: 19 · 2018: 22 · 2017: 26 · 2016: 18 · 2015: 27 · 2014: 18 · 2013: 28 · 2012: 15
- FWCI
- 5.40
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Biological Psychiatry (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Mental Health (R01-MH36840, R01MH036840, K01-MH0814)
- 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, cerebellum, cerebellar vermis, cerebellar hypoplasia, environmental exploration, restricted interests, stereotypy, repetitive behavior, frontal lobe volume, brain volume, children
- MeSH terms
- Autistic Disorder, Cerebellum, Child, Child, Preschool, Exploratory Behavior, Female, Frontal Lobe, Humans, Magnetic Resonance Imaging, Male, Motor Activity, Stereotyped Behavior, Time Factors
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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