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Autism Spectrum Disorder01:19

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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.
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Conscious and Non-conscious Representations of Emotional Faces in Asperger's Syndrome
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Atypical face processing in children with tuberous sclerosis complex.

Shafali Spurling Jeste1, Suzanna Hirsch, Vanessa Vogel-Farley

  • 11UCLA Semel Institute for Neuroscience and Human Behavior, Los Angeles, CA, USA.

Journal of Child Neurology
|November 13, 2012
PubMed
Summary

Children with tuberous sclerosis complex (TSC) show delayed brain responses to faces. This electrophysiological finding in TSC may offer insights into autism development in affected children.

Keywords:
autismcortical tubersevoked potentialstuberous sclerosis complex

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Genetics

Background:

  • Tuberous sclerosis complex (TSC) is associated with a high incidence of autism spectrum disorder (ASD).
  • Impaired face processing is a known characteristic of autism.
  • Electrophysiological markers offer objective measures of neural function.

Purpose of the Study:

  • To investigate electrophysiological markers of face processing in young children with TSC.
  • To explore potential neural pathways linking TSC to autism through face perception deficits.

Main Methods:

  • A familiar-unfamiliar faces paradigm was used.
  • Electroencephalography (EEG) measured brain responses (N290 latency).
  • 19 children with TSC (under 4 years) and 20 age-matched controls participated.

Main Results:

  • Children with TSC exhibited significantly longer N290 latency compared to controls (276 ms vs 259 ms, P = .05).
  • Children with TSC did not demonstrate typical hemispheric differences in face processing.
  • The longest N290 latencies were observed in children with both TSC and autism, and those with temporal lobe tubers.

Conclusions:

  • This study provides the first quantification of atypical face processing in children with TSC.
  • Delayed and atypical face processing may represent a functional impairment contributing to autism development in TSC.
  • These findings highlight a potential neural mechanism underlying autism in the context of TSC.