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Asperger syndrome: tests of right hemisphere functioning and interhemispheric communication
Helen L Gunter1, Mohammad Ghaziuddin, Hadyn D Ellis
1School of Psychology, Cardiff University, Cardiff, UK.
Journal of Autism and Developmental Disorders
|August 30, 2002
Summary
This study found that Asperger syndrome (AS) shares significant neuropsychological similarities with Rourke's nonverbal learning disabilities (NLD) model. The findings highlight overlapping deficits and assets in individuals with AS and NLD.
Area of Science:
- Neuropsychology
- Developmental Psychology
- Neurology
Background:
- Nonverbal learning disabilities (NLD) model characterized by nonverbal deficits and verbal strengths.
- Hypothesized neurological basis involving white matter dysfunction and right hemisphere involvement.
- Asperger syndrome (AS) presents with distinct social and communication challenges.
Purpose of the Study:
- To compare the neuropsychological profile of Asperger syndrome (AS) with Rourke's nonverbal learning disabilities (NLD) model.
- To determine the extent of resemblance between NLD and AS.
- To investigate potential shared neurological underpinnings.
Main Methods:
- Assessment of eight participants with Asperger syndrome (ages 10-41).
- Evaluation of pragmatics of language and communication.
- Testing of verbal and visual memory, visual-spatial abilities, and bimanual motor skills.
Main Results:
- Confirmed a close similarity between the neuropsychological profiles of NLD and AS.
- Demonstrated overlapping patterns of assets and deficits.
- Supported the hypothesis of shared underlying neurological characteristics.
Conclusions:
- Asperger syndrome and nonverbal learning disabilities exhibit significant overlap in their neuropsychological manifestations.
- The findings suggest potential commonalities in the neurological basis of AS and NLD.
- Further research into shared white matter and hemispheric functioning is warranted.