ERPs and eye movements reflect atypical visual perception in pervasive developmental disorder.
Many studies of eye tracking or event-related brain potentials (ERPs) in subjects with Pervasive Developmental Disorder (PDD) have yielded inconsistent results on attentional processing. However, recent studies have indicated that there are specific abnormalities in early processing that are probably related to perception. ERP amplitudes in response to visual stimuli, measured above the occipital (modality-specific) cortex, are reported to be abnormally small in patients with PDD, and the abnormal visual processing is possibly associated with the spatial visual frequency content of stimuli. It is suggested that subjects with PDD show abnormal activation of visual pathways dedicated to the processing of high and low spatial frequencies.
Kemner
Chantal
C
Rudolf Magnus Institute of Neuroscience, Department of Child and Adolescent Psychiatry, University Medical Center Utrecht, The Netherlands. C.Kemner@umcutrecht.nl
van Engeland
Herman
H
D001288:Attention / Q000502:physiology; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000503:physiopathology*; D018913:Event-Related Potentials, P300 / Q000502:physiology*; D005133:Eye Movements / Q000502:physiology*; D006801:Humans; D009778:Occipital Lobe / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*