Audiovisual Speech Perception and Eye Gaze Behavior of Adults with Asperger Syndrome / Satu SAALASTI in Journal of Autism and Developmental Disorders, 42-8 (August 2012)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 42-8 (August 2012) . - p.1606-1615 Titre : Audiovisual Speech Perception and Eye Gaze Behavior of Adults with Asperger Syndrome Type de document : Texte imprimé et/ou numérique Auteurs : Satu SAALASTI, Auteur ; Jari V. KATSYRI, Auteur ; Kaisa TIIPPANA, Auteur ; Mari LAINE-HERNANDEZ, Auteur ; Lennart VON WENDT, Auteur ; Mikko E. SAMS, Auteur Année de publication : 2012 Article en page(s) : p.1606-1615 Langues : Anglais (eng) Mots-clés : Asperger syndrome  Autism spectrum disorders  Multisensory integration  Audiovisual speech  Eye gaze behavior  Perception Index. décimale : PER Périodiques Résumé : Audiovisual speech perception was studied in adults with Asperger syndrome (AS), by utilizing the McGurk effect, in which conflicting visual articulation alters the perception of heard speech. The AS group perceived the audiovisual stimuli differently from age, sex and IQ matched controls. When a voice saying /p/ was presented with a face articulating /k/, the controls predominantly heard /k/. Instead, the AS group heard /k/ and /t/ with almost equal frequency, but with large differences between individuals. There were no differences in gaze direction or unisensory perception between the AS and control participants that could have contributed to the audiovisual differences. We suggest an explanation in terms of weak support from the motor system for audiovisual speech perception in AS. En ligne : http://dx.doi.org/10.1007/s10803-011-1400-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=178 [article] Audiovisual Speech Perception and Eye Gaze Behavior of Adults with Asperger Syndrome [Texte imprimé et/ou numérique] / Satu SAALASTI, Auteur ; Jari V. KATSYRI, Auteur ; Kaisa TIIPPANA, Auteur ; Mari LAINE-HERNANDEZ, Auteur ; Lennart VON WENDT, Auteur ; Mikko E. SAMS, Auteur . - 2012 . - p.1606-1615. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 42-8 (August 2012) . - p.1606-1615 Mots-clés : Asperger syndrome  Autism spectrum disorders  Multisensory integration  Audiovisual speech  Eye gaze behavior  Perception Index. décimale : PER Périodiques Résumé : Audiovisual speech perception was studied in adults with Asperger syndrome (AS), by utilizing the McGurk effect, in which conflicting visual articulation alters the perception of heard speech. The AS group perceived the audiovisual stimuli differently from age, sex and IQ matched controls. When a voice saying /p/ was presented with a face articulating /k/, the controls predominantly heard /k/. Instead, the AS group heard /k/ and /t/ with almost equal frequency, but with large differences between individuals. There were no differences in gaze direction or unisensory perception between the AS and control participants that could have contributed to the audiovisual differences. We suggest an explanation in terms of weak support from the motor system for audiovisual speech perception in AS. En ligne : http://dx.doi.org/10.1007/s10803-011-1400-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=178

Valence Scaling of Dynamic Facial Expressions is Altered in High-Functioning Subjects with Autism Spectrum Disorders: an fMRI Study / Jukka S. RAHKO in Journal of Autism and Developmental Disorders, 42-6 (June 2012)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 42-6 (June 2012) . - p.1011-1024 Titre : Valence Scaling of Dynamic Facial Expressions is Altered in High-Functioning Subjects with Autism Spectrum Disorders: an fMRI Study Type de document : Texte imprimé et/ou numérique Auteurs : Jukka S. RAHKO, Auteur ; Jyri-Johan PAAKKI, Auteur ; Tuomo H. STARCK, Auteur ; Juha NIKKINEN, Auteur ; David L. PAULS, Auteur ; Jari V. KATSYRI, Auteur ; Eira JANSSON-VERKASALO, Auteur ; Alice S. CARTER, Auteur ; Tuula HURTIG, Auteur ; Marja-Leena MATTILA, Auteur ; Katja JUSSILA, Auteur ; Jukka J. REMES, Auteur ; Sanna KUUSIKKO-GAUFFIN, Auteur ; Mikko E. SAMS, Auteur ; Sven BÖLTE, Auteur ; Hanna EBELING, Auteur ; Irma MOILANEN, Auteur ; Osmo TERVONEN, Auteur ; Vesa KIVINIEMI, Auteur Année de publication : 2012 Article en page(s) : p.1011-1024 Langues : Anglais (eng) Mots-clés : Autism spectrum disorders  Emotional facial expressions  Face processing  Functional MRI  Mirror neuron system  Valence Index. décimale : PER Périodiques Résumé : FMRI was performed with the dynamic facial expressions fear and happiness. This was done to detect differences in valence processing between 25 subjects with autism spectrum disorders (ASDs) and 27 typically developing controls. Valence scaling was abnormal in ASDs. Positive valence induces lower deactivation and abnormally strong activity in ASD in multiple regions. Negative valence increased deactivation in visual areas in subjects with ASDs. The most marked differences between valences focus on fronto-insular and temporal regions. This supports the idea that subjects with ASDs may have difficulty in passive processing of the salience and mirroring of expressions. When the valence scaling of brain activity fails, in contrast to controls, these areas activate and/or deactivate inappropriately during facial stimuli presented dynamically. En ligne : http://dx.doi.org/10.1007/s10803-011-1332-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=156 [article] Valence Scaling of Dynamic Facial Expressions is Altered in High-Functioning Subjects with Autism Spectrum Disorders: an fMRI Study [Texte imprimé et/ou numérique] / Jukka S. RAHKO, Auteur ; Jyri-Johan PAAKKI, Auteur ; Tuomo H. STARCK, Auteur ; Juha NIKKINEN, Auteur ; David L. PAULS, Auteur ; Jari V. KATSYRI, Auteur ; Eira JANSSON-VERKASALO, Auteur ; Alice S. CARTER, Auteur ; Tuula HURTIG, Auteur ; Marja-Leena MATTILA, Auteur ; Katja JUSSILA, Auteur ; Jukka J. REMES, Auteur ; Sanna KUUSIKKO-GAUFFIN, Auteur ; Mikko E. SAMS, Auteur ; Sven BÖLTE, Auteur ; Hanna EBELING, Auteur ; Irma MOILANEN, Auteur ; Osmo TERVONEN, Auteur ; Vesa KIVINIEMI, Auteur . - 2012 . - p.1011-1024. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 42-6 (June 2012) . - p.1011-1024 Mots-clés : Autism spectrum disorders  Emotional facial expressions  Face processing  Functional MRI  Mirror neuron system  Valence Index. décimale : PER Périodiques Résumé : FMRI was performed with the dynamic facial expressions fear and happiness. This was done to detect differences in valence processing between 25 subjects with autism spectrum disorders (ASDs) and 27 typically developing controls. Valence scaling was abnormal in ASDs. Positive valence induces lower deactivation and abnormally strong activity in ASD in multiple regions. Negative valence increased deactivation in visual areas in subjects with ASDs. The most marked differences between valences focus on fronto-insular and temporal regions. This supports the idea that subjects with ASDs may have difficulty in passive processing of the salience and mirroring of expressions. When the valence scaling of brain activity fails, in contrast to controls, these areas activate and/or deactivate inappropriately during facial stimuli presented dynamically. En ligne : http://dx.doi.org/10.1007/s10803-011-1332-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=156

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