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Related Concept Videos

Autism Spectrum Disorder01:19

Autism Spectrum Disorder

180
Autism spectrum disorder (ASD) is a neurodevelopmental condition marked by persistent deficits in social communication and interaction alongside restrictive and repetitive behaviors or interests. ASD is sometimes accompanied by intellectual impairment.
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
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Related Experiment Video

Updated: Aug 11, 2025

Comparing Eye-tracking Data of Children with High-functioning ASD, Comorbid ADHD, and of a Control Watching Social Videos
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Diminished Repetition Suppression Reveals Selective and Systems-Level Face Processing Differences in ASD.

Anila M D'Mello1, Isabelle R Frosch2, Steven L Meisler3

  • 1McGovern Institute for Brain Research and Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139 anila.dmello@utsouthwestern.edu.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|February 9, 2023
PubMed
Summary
This summary is machine-generated.

Autistic adults show reduced neural adaptation to repeated faces, not other stimuli. This face-specific repetition suppression difference is linked to social communication challenges and altered brain connectivity in autism spectrum disorder (ASD).

Keywords:
autismdiffusion weighted imagingfMRIfacesfunctional connectivityrepetition suppression

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Developmental Neuroscience

Background:

  • Repetition suppression (RS) is a neural mechanism reflecting adaptation to repeated stimuli, crucial for learning and perception.
  • Reduced RS is observed in neurodevelopmental disorders, including autism spectrum disorder (ASD), potentially contributing to sensory and social challenges.
  • The specific scope of RS alterations in ASD across different sensory modalities and stimulus types remains largely unknown.

Purpose of the Study:

  • To investigate repetition suppression (RS) across visual and auditory domains in autistic and neurotypical adults.
  • To examine RS for various stimulus categories including faces, objects, and words in individuals with ASD.
  • To explore the relationship between RS, social communication abilities, and neural connectivity in ASD.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity in autistic and neurotypical adults.
  • Repetition suppression was assessed across visual and auditory modalities for faces, objects, printed words, and spoken words.
  • Functional connectivity and white matter microstructure analyses were conducted on related neural regions.

Main Results:

  • Autistic individuals exhibited significantly reduced repetition suppression (RS) specifically for face stimuli, but not for objects or words.
  • Reduced face RS in ASD correlated with greater social communication difficulties.
  • Altered functional connectivity and white matter microstructure were found between face processing regions in autistic adults.

Conclusions:

  • Neural mechanisms for face processing, including repetition suppression, are selectively altered in autism spectrum disorder (ASD).
  • These face-specific neural alterations may underlie difficulties in social communication observed in ASD.
  • Findings highlight domain-specific disruptions in neural adaptation and connectivity related to face recognition in ASD.