FEATURES OF THE BRAIN EVOKED POTENTIALS IN CHILDREN WITH THE SYNDROME OF EARLY INFANTILE AUTISM IN PERCEPTION ILLUSORY CONTOUR
I.N. Posikera1, N.P. Pushina1, A.O. Prokofev1, M.M. Tsetlin1, A.A. Morozov2, U.V. Obuhov2, V.A. Morozov2
1 Psychological Institute, RAE, 2 Institute of Radio Engineer and Electronics, RAS, Moscow
We investigated the hypothesis of the violation of the so-called «intermediate» automatic brain mechanisms for processing visual patterns, associated with the processes of perception integral images in children with the syndrome of early infantile autism (EIA) at the age of 3–6 years. We investigated eventrelated evoked potentials (EREP), upon presentation of visual illusions (square Canisius) and control non-illusory image. As a result, it was found that children without disabilities in the development of the perception of the illusion is accompanied by a more negative N1 component of the EREP compared with non-illusory fi gure in the parietal areas of the right hemisphere («eff ect of illusion»). Children with the syndrome of EIA showed the reverse «eff ect of the illusion» that is a positive component of the EREP N1 in response to the illusory fi gure. Th us, in healthy children, as well as in adults, the identifi cation of the illusion depends on the activity of the secondary visual areas of the right hemisphere. In children with the syndrome EIA distinction illusory and non-illusory fi gures may occur through the mechanisms of processing of collinearity embedded in neural networks of the primary visual cortex.
Keywords: early infantile autism, evoked potentials, perception of integrity, Canisius illusion, visual cortex.