Neurophysiological correlates of relatively enhanced local visual search in autistic adolescents
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Previous studies found normal or even superior performance of autistic patients on visuospatial tasks requiring local search, like the Embedded Figures Task (EFT). A well-known interpretation of this is "weak central coherence", i.e. autistic patients may show a reduced general ability to process information in its context and may therefore have a tendency to favour local over global aspects of information processing. An alternative view is that the local processing advantage in the EFT may result from a relative amplification of early perceptual processes which boosts processing of local stimulus properties but does not affect processing of global context. This study used functional magnetic resonance imaging (fMRI) in 12 autistic adolescents (9 Asperger and 3 high-functioning autistic patients) and 12 matched controls to help distinguish, on neurophysiological grounds, between these two accounts of EFT performance in autistic patients. Behaviourally, we found autistic individuals to be unimpaired during the EFT while they were significantly worse at performing a closely matched control task with minimal local search requirements. The fMRI results showed that activations specific for the local search aspects of the EFT were left-lateralised in parietal and premotor areas for the control group (as previously demonstrated for adults), whereas for the patients these activations were found in right primary visual cortex and bilateral extrastriate areas. These results suggest that enhanced local processing in early visual areas, as opposed to impaired processing of global context, is characteristic for performance of the EFT by autistic patients.
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Manjaly et al. (2007) and Lee et al. (2007) have also reported unusual brain activations in ASD groups whilst they performed the EFT, or an analogue thereof.
“Manjaly et al. (2007) and Lee et al. (2007) have also reported unusual brain activations in ASD groups whilst they performed the EFT, or an analogue thereof.”
From Vision in autism spectrum disorders (2009) · cites this paper as Manjaly et al. (2007)
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- Authors
- Manjaly, Z. M., Bruning, N., Neufang, S., Stephan, K. E., Brieber, S., Marshall, J. C., Kamp-Becker, I., Remschmidt, H., Herpertz-Dahlmann, B., Konrad, K., & Fink, G. R.
- Affiliations
- Forschungszentrum Jülich (DE)
- Wellcome Centre for Human Neuroimaging (GB)
- University of Oxford (GB)
- Philipps University of Marburg (DE)
- Corresponding author
- Fink, Gereon R.
- Venue
- NeuroImage
- Publisher
- Elsevier BV
- Published
- 2007-03
- Volume
- 35
- Issue
- 1
- Pages
- 283-291
- ISSN
- 1053-8119 (ISSN-L)
- PMC
- PMC2644454
- OpenAlex
- W2029355232
- Cited by
- 163
- References
- 67
- Citations by year
- 2026: 6 · 2025: 6 · 2024: 2 · 2023: 4 · 2022: 4 · 2021: 8 · 2020: 5 · 2019: 7 · 2018: 3 · 2017: 7 · 2016: 11 · 2015: 3 · 2014: 19 · 2013: 18 · 2012: 16
- FWCI
- 4.84
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- NeuroImage (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
- JuSER (Forschungszentrum Jülich) (submittedVersion)
- RWTH Publications (RWTH Aachen) (submittedVersion)
- Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
- Zurich Open Repository and Archive (University of Zurich)
- Funders
- Wellcome Trust (056750)
- Deutsche Forschungsgemeinschaft
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Autism Spectrum Disorder Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Face Recognition and Perception
- Keywords
- autism spectrum disorder, weak central coherence, Asperger syndrome, high-functioning autism, adolescents, early visual processing, extrastriate cortex, parietal cortex, premotor cortex, hemispheric lateralization
- MeSH terms
- Adolescent, Autistic Disorder, Child, Humans, Magnetic Resonance Imaging, Male, Neuropsychological Tests, Photic Stimulation, Psychiatric Status Rating Scales, Psychomotor Performance, Reaction Time, Space Perception, Visual Cortex, Visual Perception, Echo-Planar Imaging, Asperger Syndrome
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