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2 recherche sur le mot-clé 'Visual evoked potentials'
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Brief Report: Early VEPs to Pattern-Reversal in Adolescents and Adults with Autism / K. KOVARSKI in Journal of Autism and Developmental Disorders, 46-10 (October 2016)
[article]
Titre : Brief Report: Early VEPs to Pattern-Reversal in Adolescents and Adults with Autism Type de document : Texte imprimé et/ou numérique Auteurs : K. KOVARSKI, Auteur ; A. THILLAY, Auteur ; Emmanuelle HOUY-DURAND, Auteur ; S. ROUX, Auteur ; Aurélie BIDET-CAULET, Auteur ; Frédérique BONNET-BRILHAULT, Auteur ; Magali BATTY, Auteur Article en page(s) : p.3377-3386 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder Visual evoked potentials Pattern-reversal paradigm Sensory symptoms Index. décimale : PER Périodiques Résumé : Autism spectrum disorder (ASD) is characterized by atypical visual perception both in the social and nonsocial domain. In order to measure a reliable visual response, visual evoked potentials were recorded during a passive pattern-reversal stimulation in adolescents and adults with and without ASD. While the present results show the same age-related changes in both autistic and non-autistic groups, they reveal a smaller P100 amplitude in the ASD group compared to controls. These results confirm that early visual responses are affected in ASD even with a simple, non social and passive stimulation and suggest that they should be considered in order to better understand higher-level processes. En ligne : http://dx.doi.org/10.1007/s10803-016-2880-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=293
in Journal of Autism and Developmental Disorders > 46-10 (October 2016) . - p.3377-3386[article] Brief Report: Early VEPs to Pattern-Reversal in Adolescents and Adults with Autism [Texte imprimé et/ou numérique] / K. KOVARSKI, Auteur ; A. THILLAY, Auteur ; Emmanuelle HOUY-DURAND, Auteur ; S. ROUX, Auteur ; Aurélie BIDET-CAULET, Auteur ; Frédérique BONNET-BRILHAULT, Auteur ; Magali BATTY, Auteur . - p.3377-3386.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 46-10 (October 2016) . - p.3377-3386
Mots-clés : Autism spectrum disorder Visual evoked potentials Pattern-reversal paradigm Sensory symptoms Index. décimale : PER Périodiques Résumé : Autism spectrum disorder (ASD) is characterized by atypical visual perception both in the social and nonsocial domain. In order to measure a reliable visual response, visual evoked potentials were recorded during a passive pattern-reversal stimulation in adolescents and adults with and without ASD. While the present results show the same age-related changes in both autistic and non-autistic groups, they reveal a smaller P100 amplitude in the ASD group compared to controls. These results confirm that early visual responses are affected in ASD even with a simple, non social and passive stimulation and suggest that they should be considered in order to better understand higher-level processes. En ligne : http://dx.doi.org/10.1007/s10803-016-2880-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=293 Evidence of hyper-plasticity in adults with Autism Spectrum Disorder / J. F. WILSON in Research in Autism Spectrum Disorders, 43-44 (November 2017)
[article]
Titre : Evidence of hyper-plasticity in adults with Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : J. F. WILSON, Auteur ; V. LODHIA, Auteur ; D. P. COURTNEY, Auteur ; I. J. KIRK, Auteur ; J. P. HAMM, Auteur Article en page(s) : p.40-52 Langues : Anglais (eng) Mots-clés : Long-term potentiation Autism spectrum disorder Plasticity Visual evoked potentials EEG Index. décimale : PER Périodiques Résumé : AbstractBackground Long-term potentiation (LTP) is a form of synaptic plasticity involved in learning and memory. Abnormal levels of LTP have been suggested to contribute to symptoms in a number of disorders, and here we examined the extent to which LTP may be affected in autism spectrum disorders (ASD). While animal models of ASD have suggested LTP may be atypical, the results have been inconsistent in terms of the direction of abnormality. Method In the present study a paradigm for non-invasively eliciting LTP in humans was utilized to test a group of adults with ASD and matched controls. This paradigm uses high-frequency visual stimulation as the LTP-inducing stimulus, and the effect of LTP is reflected by an increase in amplitude of the visually-elicited N1b component of the visual evoked potential (VEP). Result Main effects for Hemisphere and Tetanus were found. While Group interactions were not found, a Group by Tetanus interaction was approaching significance and was determined to be weak evidence against the null ((pH0|D = 0.44) therefore, LTP effects were explored within groups for the N1 component. It was found that the ASD group had a greater N1 amplitude compared to controls. Conclusion Our results showed that the ASD group had greater N1 amplitude post-tetanus over the right hemisphere compared to controls and demonstrate elevated LTP. These results support the notion of enhanced perceptual functioning, as elevated LTP may be related to superior visual processing due to overspecialised neural networks in ASD. En ligne : https://doi.org/10.1016/j.rasd.2017.09.005 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=327
in Research in Autism Spectrum Disorders > 43-44 (November 2017) . - p.40-52[article] Evidence of hyper-plasticity in adults with Autism Spectrum Disorder [Texte imprimé et/ou numérique] / J. F. WILSON, Auteur ; V. LODHIA, Auteur ; D. P. COURTNEY, Auteur ; I. J. KIRK, Auteur ; J. P. HAMM, Auteur . - p.40-52.
Langues : Anglais (eng)
in Research in Autism Spectrum Disorders > 43-44 (November 2017) . - p.40-52
Mots-clés : Long-term potentiation Autism spectrum disorder Plasticity Visual evoked potentials EEG Index. décimale : PER Périodiques Résumé : AbstractBackground Long-term potentiation (LTP) is a form of synaptic plasticity involved in learning and memory. Abnormal levels of LTP have been suggested to contribute to symptoms in a number of disorders, and here we examined the extent to which LTP may be affected in autism spectrum disorders (ASD). While animal models of ASD have suggested LTP may be atypical, the results have been inconsistent in terms of the direction of abnormality. Method In the present study a paradigm for non-invasively eliciting LTP in humans was utilized to test a group of adults with ASD and matched controls. This paradigm uses high-frequency visual stimulation as the LTP-inducing stimulus, and the effect of LTP is reflected by an increase in amplitude of the visually-elicited N1b component of the visual evoked potential (VEP). Result Main effects for Hemisphere and Tetanus were found. While Group interactions were not found, a Group by Tetanus interaction was approaching significance and was determined to be weak evidence against the null ((pH0|D = 0.44) therefore, LTP effects were explored within groups for the N1 component. It was found that the ASD group had a greater N1 amplitude compared to controls. Conclusion Our results showed that the ASD group had greater N1 amplitude post-tetanus over the right hemisphere compared to controls and demonstrate elevated LTP. These results support the notion of enhanced perceptual functioning, as elevated LTP may be related to superior visual processing due to overspecialised neural networks in ASD. En ligne : https://doi.org/10.1016/j.rasd.2017.09.005 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=327