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Auteur Laurent MOTTRON |
Documents disponibles écrits par cet auteur (64)
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Enhanced connectivity between visual cortex and other regions of the brain in autism: a REM sleep EEG coherence study / Cathy LEVEILLE in Autism Research, 3-5 (October 2010)
[article]
Titre : Enhanced connectivity between visual cortex and other regions of the brain in autism: a REM sleep EEG coherence study Type de document : Texte imprimé et/ou numérique Auteurs : Cathy LEVEILLE, Auteur ; Elise B. BARBEAU, Auteur ; Christianne BOLDUC, Auteur ; Elyse LIMOGES, Auteur ; Claude BERTHIAUME, Auteur ; Elyse CHEVRIER, Auteur ; Laurent MOTTRON, Auteur ; Roger GODBOUT, Auteur Année de publication : 2010 Article en page(s) : p.280-285 Langues : Anglais (eng) Mots-clés : autism occipital cortex REM sleep EEG EEG coherence visual perception neural coupling Index. décimale : PER Périodiques Résumé : Functional interregional neural coupling was measured as EEG coherence during REM sleep, a state of endogenous cortical activation, in 9 adult autistic individuals (21.1±4.0 years) and 13 typically developed controls (21.5±4.3 years) monitored for two consecutive nights in a sleep laboratory. Spectral analysis was performed on 60 s of artefact-free EEG samples distributed equally throughout the first four REM sleep periods of the second night. EEG coherence was calculated for six frequency bands (delta, theta, alpha, sigma, beta, and total spectrum) using a 22-electrode montage. The magnitude of coherence function was computed for intra- and interhemispheric pairs of recording sites. Results were compared by Multivariate Analysis of Variance (MANOVA). Each time the autistic group showed a greater EEG coherence than the controls; it involved intrahemispheric communication among the left visual cortex (O1) and other regions either close to or distant from the occipital cortex. In contrast, lower coherence values involved frontal electrodes in the right hemisphere. No significant differences between groups were found for interhemispheric EEG coherence. These results show that the analysis of EEG coherence during REM sleep can disclose patterns of cortical connectivity that can be reduced or increased in adults with autism compared to typically developed individuals, depending of the cortical areas studied. Superior coherence involving visual perceptual areas in autism is consistent with an enhanced role of perception in autistic brain organization. En ligne : http://dx.doi.org/10.1002/aur.155 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=115
in Autism Research > 3-5 (October 2010) . - p.280-285[article] Enhanced connectivity between visual cortex and other regions of the brain in autism: a REM sleep EEG coherence study [Texte imprimé et/ou numérique] / Cathy LEVEILLE, Auteur ; Elise B. BARBEAU, Auteur ; Christianne BOLDUC, Auteur ; Elyse LIMOGES, Auteur ; Claude BERTHIAUME, Auteur ; Elyse CHEVRIER, Auteur ; Laurent MOTTRON, Auteur ; Roger GODBOUT, Auteur . - 2010 . - p.280-285.
Langues : Anglais (eng)
in Autism Research > 3-5 (October 2010) . - p.280-285
Mots-clés : autism occipital cortex REM sleep EEG EEG coherence visual perception neural coupling Index. décimale : PER Périodiques Résumé : Functional interregional neural coupling was measured as EEG coherence during REM sleep, a state of endogenous cortical activation, in 9 adult autistic individuals (21.1±4.0 years) and 13 typically developed controls (21.5±4.3 years) monitored for two consecutive nights in a sleep laboratory. Spectral analysis was performed on 60 s of artefact-free EEG samples distributed equally throughout the first four REM sleep periods of the second night. EEG coherence was calculated for six frequency bands (delta, theta, alpha, sigma, beta, and total spectrum) using a 22-electrode montage. The magnitude of coherence function was computed for intra- and interhemispheric pairs of recording sites. Results were compared by Multivariate Analysis of Variance (MANOVA). Each time the autistic group showed a greater EEG coherence than the controls; it involved intrahemispheric communication among the left visual cortex (O1) and other regions either close to or distant from the occipital cortex. In contrast, lower coherence values involved frontal electrodes in the right hemisphere. No significant differences between groups were found for interhemispheric EEG coherence. These results show that the analysis of EEG coherence during REM sleep can disclose patterns of cortical connectivity that can be reduced or increased in adults with autism compared to typically developed individuals, depending of the cortical areas studied. Superior coherence involving visual perceptual areas in autism is consistent with an enhanced role of perception in autistic brain organization. En ligne : http://dx.doi.org/10.1002/aur.155 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=115 Enhanced Perceptual Functioning in the Development of Autism / Laurent MOTTRON
Titre : Enhanced Perceptual Functioning in the Development of Autism Type de document : Texte imprimé et/ou numérique Auteurs : Laurent MOTTRON, Auteur ; Jacob A. BURACK, Auteur Année de publication : 2001 Importance : p.131-148 Langues : Anglais (eng) Mots-clés : Syndrome du savant Index. décimale : AUT-B AUT-B - L'Autisme - Ouvrages généraux et scientifiques Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=385 Enhanced Perceptual Functioning in the Development of Autism [Texte imprimé et/ou numérique] / Laurent MOTTRON, Auteur ; Jacob A. BURACK, Auteur . - 2001 . - p.131-148.
Langues : Anglais (eng)
Mots-clés : Syndrome du savant Index. décimale : AUT-B AUT-B - L'Autisme - Ouvrages généraux et scientifiques Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=385 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire ERP Correlates of Recognition Memory in Autism Spectrum Disorder / Esha MASSAND in Journal of Autism and Developmental Disorders, 43-9 (September 2013)
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Titre : ERP Correlates of Recognition Memory in Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : Esha MASSAND, Auteur ; Dermot M. BOWLER, Auteur ; Laurent MOTTRON, Auteur ; Anthony HOSEIN, Auteur ; Boutheina JEMEL, Auteur Article en page(s) : p.2038-2047 Langues : Anglais (eng) Mots-clés : Memory Autism spectrum disorder Event-related potential Recognition Old/new effect Index. décimale : PER Périodiques Résumé : Recognition memory in autism spectrum disorder (ASD) tends to be undiminished compared to that of typically developing (TD) individuals (Bowler et al. 2007), but it is still unknown whether memory in ASD relies on qualitatively similar or different neurophysiology. We sought to explore the neural activity underlying recognition by employing the old/new word repetition event-related potential effect. Behavioural recognition performance was comparable across both groups, and demonstrated superior recognition for low frequency over high frequency words. However, the ASD group showed a parietal rather than anterior onset (300–500 ms), and diminished right frontal old/new effects (800–1500 ms) relative to TD individuals. This study shows that undiminished recognition performance results from a pattern of differing functional neurophysiology in ASD. En ligne : http://dx.doi.org/10.1007/s10803-012-1755-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=212
in Journal of Autism and Developmental Disorders > 43-9 (September 2013) . - p.2038-2047[article] ERP Correlates of Recognition Memory in Autism Spectrum Disorder [Texte imprimé et/ou numérique] / Esha MASSAND, Auteur ; Dermot M. BOWLER, Auteur ; Laurent MOTTRON, Auteur ; Anthony HOSEIN, Auteur ; Boutheina JEMEL, Auteur . - p.2038-2047.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 43-9 (September 2013) . - p.2038-2047
Mots-clés : Memory Autism spectrum disorder Event-related potential Recognition Old/new effect Index. décimale : PER Périodiques Résumé : Recognition memory in autism spectrum disorder (ASD) tends to be undiminished compared to that of typically developing (TD) individuals (Bowler et al. 2007), but it is still unknown whether memory in ASD relies on qualitatively similar or different neurophysiology. We sought to explore the neural activity underlying recognition by employing the old/new word repetition event-related potential effect. Behavioural recognition performance was comparable across both groups, and demonstrated superior recognition for low frequency over high frequency words. However, the ASD group showed a parietal rather than anterior onset (300–500 ms), and diminished right frontal old/new effects (800–1500 ms) relative to TD individuals. This study shows that undiminished recognition performance results from a pattern of differing functional neurophysiology in ASD. En ligne : http://dx.doi.org/10.1007/s10803-012-1755-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=212 Evaluation des capacités d'imagerie mentale visuelle dans l'autisme / C. BLED in Bulletin Scientifique de l'arapi (Le), 51 (2023/1)
[article]
Titre : Evaluation des capacités d'imagerie mentale visuelle dans l'autisme Type de document : Texte imprimé et/ou numérique Auteurs : C. BLED, Auteur ; Q. GUILLON, Auteur ; Laurent MOTTRON, Auteur ; Isabelle SOULIERES, Auteur ; Laurence BOUVET, Auteur Année de publication : 2023 Article en page(s) : p.54-58 Langues : Français (fre) Index. décimale : PER Périodiques Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=518
in Bulletin Scientifique de l'arapi (Le) > 51 (2023/1) . - p.54-58[article] Evaluation des capacités d'imagerie mentale visuelle dans l'autisme [Texte imprimé et/ou numérique] / C. BLED, Auteur ; Q. GUILLON, Auteur ; Laurent MOTTRON, Auteur ; Isabelle SOULIERES, Auteur ; Laurence BOUVET, Auteur . - 2023 . - p.54-58.
Langues : Français (fre)
in Bulletin Scientifique de l'arapi (Le) > 51 (2023/1) . - p.54-58
Index. décimale : PER Périodiques Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=518 Far visual acuity is unremarkable in autism: Do we need to focus on crowding? / Luc KEITA in Autism Research, 3-6 (December 2010)
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Titre : Far visual acuity is unremarkable in autism: Do we need to focus on crowding? Type de document : Texte imprimé et/ou numérique Auteurs : Luc KEITA, Auteur ; Laurent MOTTRON, Auteur ; Armando BERTONE, Auteur Année de publication : 2010 Article en page(s) : p.333-341 Langues : Anglais (eng) Mots-clés : autism vision acuity crowding neural lateral interactions Index. décimale : PER Périodiques Résumé : Although autism presents a unique perceptual phenotype defined in part by atypical (often enhanced) analysis of spatial information, few biologically plausible hypotheses have been advanced to explain its neural underpinnings. One plausible explanation is functional but altered lateral connectivity mediating early or local mechanisms selectively responsive to different stimulus attributes, including spatial frequency and contrast. The goal of the present study was first to assess far visual acuity in autism using Landolt-C optotypes defined by different local stimulus attributes. Second, we investigated whether acuity is differentially affected in autism when target optotypes are simultaneously presented with flanking stimuli at different distances. This typical detrimental “crowding effect” of flanking stimuli on target optotype discrimination is attributed to lateral inhibitory interaction of neurons encoding for visual properties of distracters close to the target. Results failed to demonstrate a between-group difference in acuity to Landolt-C optotypes, whether defined by luminance- or texture-contrast. However, the expected crowding effect at one gap-size opening distance was evidenced for the control group only; a small effect was observed for the autism group at two gap-size opening. These results suggest that although far visual acuity is unremarkable in autism, altered local lateral connectivity within early perceptual areas underlying spatial information processing in autism is atypical. Altered local lateral connectivity in autism might originate from an imbalance in excitatory/inhibitory neural signaling, resulting in changes regarding elementary feature extraction and subsequent downstream visual integration and visuo-spatial analysis. This notion is discussed within the context of characteristic lower- and higher-level perceptual processing in autism. En ligne : http://dx.doi.org/10.1002/aur.164 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=115
in Autism Research > 3-6 (December 2010) . - p.333-341[article] Far visual acuity is unremarkable in autism: Do we need to focus on crowding? [Texte imprimé et/ou numérique] / Luc KEITA, Auteur ; Laurent MOTTRON, Auteur ; Armando BERTONE, Auteur . - 2010 . - p.333-341.
Langues : Anglais (eng)
in Autism Research > 3-6 (December 2010) . - p.333-341
Mots-clés : autism vision acuity crowding neural lateral interactions Index. décimale : PER Périodiques Résumé : Although autism presents a unique perceptual phenotype defined in part by atypical (often enhanced) analysis of spatial information, few biologically plausible hypotheses have been advanced to explain its neural underpinnings. One plausible explanation is functional but altered lateral connectivity mediating early or local mechanisms selectively responsive to different stimulus attributes, including spatial frequency and contrast. The goal of the present study was first to assess far visual acuity in autism using Landolt-C optotypes defined by different local stimulus attributes. Second, we investigated whether acuity is differentially affected in autism when target optotypes are simultaneously presented with flanking stimuli at different distances. This typical detrimental “crowding effect” of flanking stimuli on target optotype discrimination is attributed to lateral inhibitory interaction of neurons encoding for visual properties of distracters close to the target. Results failed to demonstrate a between-group difference in acuity to Landolt-C optotypes, whether defined by luminance- or texture-contrast. However, the expected crowding effect at one gap-size opening distance was evidenced for the control group only; a small effect was observed for the autism group at two gap-size opening. These results suggest that although far visual acuity is unremarkable in autism, altered local lateral connectivity within early perceptual areas underlying spatial information processing in autism is atypical. Altered local lateral connectivity in autism might originate from an imbalance in excitatory/inhibitory neural signaling, resulting in changes regarding elementary feature extraction and subsequent downstream visual integration and visuo-spatial analysis. This notion is discussed within the context of characteristic lower- and higher-level perceptual processing in autism. En ligne : http://dx.doi.org/10.1002/aur.164 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=115 Flexible Visual Processing in Young Adults with Autism: The Effects of Implicit Learning on a Global–Local Task / Dana HAYWARD in Journal of Autism and Developmental Disorders, 42-11 (November 2012)
PermalinkL'hypothèse perceptive visuelle dans l'autisme / Laurent MOTTRON in Psychologie Française, 43-2 (Juin 1998)
PermalinkInfluences de certaines méthodes sur le parcours de vie / Laurent MOTTRON
PermalinkL'intervention précoce pour enfants autistes / Laurent MOTTRON
PermalinkIntervention thérapeutique utilisant les "intérêts particuliers" chez un enfant / Suzanne MINEAU in Santé Mentale au Québec, 23-1 (Printemps 1998)
Permalink" Laissez-moi passer s'il vous plaît, je suis autiste" / Laurent MOTTRON
PermalinkLateral glances toward moving stimuli among young children with autism: Early regulation of locally oriented perception? / Laurent MOTTRON in Development and Psychopathology, 19-1 (Winter 2007)
PermalinkLocal and Global Processing of Music in High-functioning Persons with Autism: Beyond Central Coherence? / Laurent MOTTRON in Journal of Child Psychology and Psychiatry, 41-8 (November 2000)
PermalinkLocal Bias in Autistic Subjects as Evidenced by Graphic Tasks: Perceptual Hierarchization or Working Memory Deficit? / Laurent MOTTRON in Journal of Child Psychology and Psychiatry, 40-5 (July 1999)
PermalinkPermalinkMultisensory Integration of Low-level Information in Autism Spectrum Disorder: Measuring Susceptibility to the Flash-Beep Illusion / Vanessa A. BAO in Journal of Autism and Developmental Disorders, 47-8 (August 2017)
PermalinkMusique autiste. Vivre et composer avec le syndrome d'Asperger / Antoine OUELLETTE
PermalinkMusique autiste. Vivre et composer avec le syndrome d'Asperger / Antoine OUELLETTE
PermalinkPerceptual Processing among High-functioning Persons with Autism / Laurent MOTTRON in Journal of Child Psychology and Psychiatry, 40-2 (February 1999)
PermalinkPoor sleep affects daytime functioning in typically developing and autistic children not complaining of sleep problems: A questionnaire-based and polysomnographic study / Andréane LAMBERT in Research in Autism Spectrum Disorders, 23 (March 2016)
PermalinkPostural Hypo-Reactivity in Autism is Contingent on Development and Visual Environment: A Fully Immersive Virtual Reality Study / Selma GREFFOU in Journal of Autism and Developmental Disorders, 42-6 (June 2012)
PermalinkPreservation of categorical perception for speech in autism with and without speech onset delay / L. CHIODO in Autism Research, 12-11 (November 2019)
PermalinkPrevalence of Clinically and Empirically Defined Talents and Strengths in Autism / Andrée-Anne S. MEILLEUR in Journal of Autism and Developmental Disorders, 45-5 (May 2015)
PermalinkA Psychosocial Study on Restricted Interests in High Functioning Persons with Pervasive Developmental Disorders / Céline MERCIER in Autism, 4-4 (December 2000)
PermalinkQuestioning the Validity of the Semantic-Pragmatic Syndrome Diagnosis / Louise GAGNON in Autism, 1-1 (July 1997)
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