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Children with autism spectrum disorder show altered cortical processing of visual information

Children with autism spectrum disorder show altered cortical processing of visual information

A key feature of early visual cortical regions is that they contain discretely organized retinotopic maps. Titration of these maps must occur through experience, and the fidelity of their spatial tuning will depend on the consistency and accuracy of the eye movement system. Anomalies in fixation patterns and the ballistics of eye movements are well documented in autism spectrum disorder (ASD), with off-center fixations a hallmark of the phenotype. We hypothesized that these atypicalities might affect the development of visuo-spatial maps and specifically that peripheral inputs might receive altered processing in ASD. Using high-density recordings of visual evoked potentials (VEPs) and a novel system-identification approach known as VESPA (visual evoked spread spectrum analysis), we assessed sensory responses to centrally and peripherally presented stimuli". Access the related EJN article at http://onlinelibrary.wiley.com/doi/10.1111/ejn.12243/full

Filming date: 02 Jul 2013

Location: Albert Einstein College of Medicine, New York

Contributors/Organisations: Dr. John Foxe

Keywords: autism, ASD, Vision, magnocellular pathway, Parvocellular pathway, Autism Spectrum Disorders

Posted by: John J Foxe

Posted on: 24 Jul 2013

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Developmental Neuroscience

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