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Hemispheric function in developmental language disorders and high-level autism

J Shields1, R Varley, P Broks

  • 1Storm House School, National Autistic Society, Doncaster, UK.

Developmental Medicine and Child Neurology
|June 1, 1996
PubMed
Summary
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Children with different language disorders and autism show distinct patterns of brain hemisphere dysfunction. Neuropsychological testing revealed significant differences, suggesting unique neurological underpinnings for each condition.

Area of Science:

  • Neuropsychology
  • Developmental Neuroscience
  • Clinical Linguistics

Background:

  • Developmental language disorder (DLD) encompasses diverse subtypes, including phonologic-syntactic and semantic-pragmatic profiles.
  • High-level autism spectrum disorder (ASD) presents with complex social-communication challenges.
  • Understanding the neurobiological correlates of these conditions is crucial for targeted interventions.

Purpose of the Study:

  • To investigate hemispheric brain function differences in children with distinct DLD subtypes and high-level ASD.
  • To compare these groups against a typically developing control group.
  • To identify specific patterns of neuropsychological deficits associated with each condition.

Main Methods:

  • A comprehensive battery of neuropsychological tests sensitive to left-right hemisphere function was administered.

Related Experiment Videos

  • Participants included children with phonologic-syntactic DLD, semantic-pragmatic DLD, high-level ASD, and typically developing controls.
  • Performance across various cognitive domains was analyzed to detect group-specific differences.

    • Main Results:

    • Significant differences in neuropsychological test performance were observed between the DLD subtypes, high-level ASD group, and controls.
    • Specific patterns of left-right hemisphere dysfunction emerged, differentiating the clinical groups.
    • The findings indicate distinct neurodevelopmental profiles for each condition.

    Conclusions:

    • Children with phonologic-syntactic DLD, semantic-pragmatic DLD, and high-level ASD exhibit contrasting patterns of hemispheric dysfunction.
    • Neuropsychological assessment can reveal underlying brain differences in these developmental disorders.
    • These findings support the notion of distinct etiological pathways and neurological bases for different neurodevelopmental conditions.