Developmental Changes of Autistic Symptoms / Shirley FECTEAU in Autism, 7-3 (September 2003)  

Public ISBD [article]  inAutism > 7-3 (September 2003) . - p.255-268 Titre : Developmental Changes of Autistic Symptoms Type de document : Texte imprimé et/ou numérique Auteurs : Shirley FECTEAU, Auteur ; Laurent MOTTRON, Auteur ; Claude BERTHIAUME, Auteur ; Jacob A. BURACK, Auteur Article en page(s) : p.255-268 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : The study examined developmental changes in autistic symptoms retrospectively in a sample of 28 verbal children and adolescents with autism. Individuals with Asperger syndrome, PDD-NOS, and related medical conditions were not included in the study. We compared autistic symptoms present at the retrospective assessment and during the 4- to 5-year age period using the ADI-R. Our findings revealed a significant improvement in the three domains relevant for the diagnosis of autism, independent of age or IQ level. Improvement occurred in more symptoms from the social than the communication domain, and for more symptoms from the latter than the restricted interest and repetitive behavior domains. The finding that improvement was not linked to level of functioning and was found in individuals still positive for a diagnosis of autism suggests that improvement belongs to the ‘natural history’ of the handicap. En ligne : http://dx.doi.org/10.1177/1362361303007003003 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=210 [article] Developmental Changes of Autistic Symptoms [Texte imprimé et/ou numérique] / Shirley FECTEAU, Auteur ; Laurent MOTTRON, Auteur ; Claude BERTHIAUME, Auteur ; Jacob A. BURACK, Auteur . - p.255-268. Langues : Anglais (eng) in Autism > 7-3 (September 2003) . - p.255-268 Index. décimale : PER Périodiques Résumé : The study examined developmental changes in autistic symptoms retrospectively in a sample of 28 verbal children and adolescents with autism. Individuals with Asperger syndrome, PDD-NOS, and related medical conditions were not included in the study. We compared autistic symptoms present at the retrospective assessment and during the 4- to 5-year age period using the ADI-R. Our findings revealed a significant improvement in the three domains relevant for the diagnosis of autism, independent of age or IQ level. Improvement occurred in more symptoms from the social than the communication domain, and for more symptoms from the latter than the restricted interest and repetitive behavior domains. The finding that improvement was not linked to level of functioning and was found in individuals still positive for a diagnosis of autism suggests that improvement belongs to the ‘natural history’ of the handicap. En ligne : http://dx.doi.org/10.1177/1362361303007003003 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=210

A Developmental Perspective of Global and Local Visual Perception in Autism Spectrum Disorder / J. GUY in Journal of Autism and Developmental Disorders, 49-7 (July 2019)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 49-7 (July 2019) . - p.2706-2720 Titre : A Developmental Perspective of Global and Local Visual Perception in Autism Spectrum Disorder Type de document : Texte imprimé et/ou numérique Auteurs : J. GUY, Auteur ; Laurent MOTTRON, Auteur ; Claude BERTHIAUME, Auteur ; Armando BERTONE, Auteur Article en page(s) : p.2706-2720 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder  Development  Global and local processing  Interference  Perception  Vision Index. décimale : PER Périodiques Résumé : Individuals with autism spectrum disorder (ASD) demonstrate superior performances on visuo-spatial tasks emphasizing local information processing; however, findings from studies involving hierarchical stimuli are inconsistent. Wide age ranges and group means complicate their interpretability. Children and adolescents with and without ASD completed a Navon task wherein they identified global and local stimuli composed of either consistent or inconsistent letters. Trajectories of reaction time in global and local conditions were similar within and between groups when consistent and inconsistent stimuli were considered together, but the effect of local-to-global interference was significantly higher in participants with than without ASD. Age was not a significant predictor of local-to-global interference, suggesting that this effect emerges in childhood and persists throughout adolescence in ASD. En ligne : http://dx.doi.org/10.1007/s10803-016-2834-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=401 [article] A Developmental Perspective of Global and Local Visual Perception in Autism Spectrum Disorder [Texte imprimé et/ou numérique] / J. GUY, Auteur ; Laurent MOTTRON, Auteur ; Claude BERTHIAUME, Auteur ; Armando BERTONE, Auteur . - p.2706-2720. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 49-7 (July 2019) . - p.2706-2720 Mots-clés : Autism spectrum disorder  Development  Global and local processing  Interference  Perception  Vision Index. décimale : PER Périodiques Résumé : Individuals with autism spectrum disorder (ASD) demonstrate superior performances on visuo-spatial tasks emphasizing local information processing; however, findings from studies involving hierarchical stimuli are inconsistent. Wide age ranges and group means complicate their interpretability. Children and adolescents with and without ASD completed a Navon task wherein they identified global and local stimuli composed of either consistent or inconsistent letters. Trajectories of reaction time in global and local conditions were similar within and between groups when consistent and inconsistent stimuli were considered together, but the effect of local-to-global interference was significantly higher in participants with than without ASD. Age was not a significant predictor of local-to-global interference, suggesting that this effect emerges in childhood and persists throughout adolescence in ASD. En ligne : http://dx.doi.org/10.1007/s10803-016-2834-1 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=401

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)  

Public ISBD [article]  inAutism Research > 3-5 (October 2010) . - p.280-285 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 [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

Lateral 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)  

Public ISBD [article]  inDevelopment and Psychopathology > 19-1 (Winter 2007) . - p. 23-36 Titre : Lateral glances toward moving stimuli among young children with autism: Early regulation of locally oriented perception? Type de document : Texte imprimé et/ou numérique Auteurs : Laurent MOTTRON, Auteur ; Tony CHARMAN, Auteur ; Sylvain PALARDY, Auteur ; Michel LEMAY, Auteur ; Michelle DAWSON, Auteur ; Claude BERTHIAUME, Auteur ; Catherine ST-CHARLES BERNIER, Auteur ; Geneviève MARTEL, Auteur ; Suzanne MINEAU, Auteur ; Jocelyn FAUBERT, Auteur Année de publication : 2007 Article en page(s) : p. 23-36 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Autistic adults display enhanced and locally oriented low-level perception of static visual information, but diminished perception of some types of movement. The identification of potential precursors, such as atypical perceptual processing, among very young children would be an initial step toward understanding the development of these phenomena. The purpose of this study was to provide an initial measure and interpretation of atypical visual exploratory behaviors toward inanimate objects (AVEBIOs) among young children with autism. A coding system for AVEBIOs was constructed from a corpus of 40 semistandardized assessments of autistic children. The most frequent atypical visual behavior among 15 children aged 33–73 months was lateral glance that was mostly oriented toward moving stimuli and was detected reliably by the experimenters (intraclass correlation > .90). This behavior was more common among autistic than typically developing children of similar verbal mental age and chronological age. As lateral vision is associated with the filtering of high spatial frequency (detail perception) information and the facilitation of high temporal frequencies (movement perception), its high prevalence among very young autistic children may reflect early attempts to regulate and/or optimize both excessive amounts of local information and diminished perception of movement. These findings are initial evidence for the need to consider the neural bases and development of atypical behaviors and their implications for intervention strategies. En ligne : http://dx.doi.org/10.1017/s0954579407070022 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=583 [article] Lateral glances toward moving stimuli among young children with autism: Early regulation of locally oriented perception? [Texte imprimé et/ou numérique] / Laurent MOTTRON, Auteur ; Tony CHARMAN, Auteur ; Sylvain PALARDY, Auteur ; Michel LEMAY, Auteur ; Michelle DAWSON, Auteur ; Claude BERTHIAUME, Auteur ; Catherine ST-CHARLES BERNIER, Auteur ; Geneviève MARTEL, Auteur ; Suzanne MINEAU, Auteur ; Jocelyn FAUBERT, Auteur . - 2007 . - p. 23-36. Langues : Anglais (eng) in Development and Psychopathology > 19-1 (Winter 2007) . - p. 23-36 Index. décimale : PER Périodiques Résumé : Autistic adults display enhanced and locally oriented low-level perception of static visual information, but diminished perception of some types of movement. The identification of potential precursors, such as atypical perceptual processing, among very young children would be an initial step toward understanding the development of these phenomena. The purpose of this study was to provide an initial measure and interpretation of atypical visual exploratory behaviors toward inanimate objects (AVEBIOs) among young children with autism. A coding system for AVEBIOs was constructed from a corpus of 40 semistandardized assessments of autistic children. The most frequent atypical visual behavior among 15 children aged 33–73 months was lateral glance that was mostly oriented toward moving stimuli and was detected reliably by the experimenters (intraclass correlation > .90). This behavior was more common among autistic than typically developing children of similar verbal mental age and chronological age. As lateral vision is associated with the filtering of high spatial frequency (detail perception) information and the facilitation of high temporal frequencies (movement perception), its high prevalence among very young autistic children may reflect early attempts to regulate and/or optimize both excessive amounts of local information and diminished perception of movement. These findings are initial evidence for the need to consider the neural bases and development of atypical behaviors and their implications for intervention strategies. En ligne : http://dx.doi.org/10.1017/s0954579407070022 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=583

NREM sleep EEG activity and procedural memory: A comparison between young neurotypical and autistic adults without sleep complaints / A. C. ROCHETTE in Autism Research, 11-4 (April 2018)  

Public ISBD [article]  inAutism Research > 11-4 (April 2018) . - p.613-623 Titre : NREM sleep EEG activity and procedural memory: A comparison between young neurotypical and autistic adults without sleep complaints Type de document : Texte imprimé et/ou numérique Auteurs : A. C. ROCHETTE, Auteur ; I. SOULIERES, Auteur ; Claude BERTHIAUME, Auteur ; R. GODBOUT, Auteur Article en page(s) : p.613-623 Langues : Anglais (eng) Mots-clés : Eeg  autism  autism spectrum disorder  delta activity  learning  memory  procedural memory  sleep Index. décimale : PER Périodiques Résumé : Delta EEG activity (0.75-3.75 Hz) during non-Rapid eye movement (NREM) sleep reflects the thalamo-cortical system contribution to memory consolidation. The functional integrity of this system is thought to be compromised in the Autism spectrum disorder (ASD). This lead us to investigate the topography of NREM sleep Delta EEG activity in young adults with ASD and typically-developed individuals (TYP). The relationship between Delta EEG activity and sensory-motor procedural information was also examined using a rotary pursuit task. Two dependent variables were computed: a learning index (performance increase across trials) and a performance index (average performance for all trials). The ASD group showed less Delta EEG activity during NREM sleep over the parieto-occipital recording sites compared to the TYP group. Delta EEG activity dropped more abruptly from frontal to posterior regions in the ASD group. Both groups of participants learned the task at a similar rate but the ASD group performed less well in terms of contact time with the target. Delta EEG activity during NREM sleep, especially during stage 2, correlated positively with the learning index for electrodes located all over the cortex in the TYP group, but only in the frontal region in the ASD group. Delta EEG activity, especially during stage 2, correlated positively with the performance index, but in the ASD group only. These results reveal an atypical thalamo-cortical functioning over the parieto-occipital region in ASD. They also point toward an atypical relationship between the frontal area and the encoding of sensory-motor procedural memory in ASD. Autism Res 2018, 11: 613-623. (c) 2018 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Slow EEG waves recorded from the scalp during sleep are thought to facilitate learning and memory during daytime. We compared these EEG waves in young autistic adults to typically-developing young adults. We found less slow EEG waves in the ASD group and the pattern of relationship with memory differed between groups. This suggests atypicalities in the way sleep mechanisms are associated with learning and performance in a sensory-motor procedural memory task in ASD individuals. En ligne : http://dx.doi.org/10.1002/aur.1933 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=358 [article] NREM sleep EEG activity and procedural memory: A comparison between young neurotypical and autistic adults without sleep complaints [Texte imprimé et/ou numérique] / A. C. ROCHETTE, Auteur ; I. SOULIERES, Auteur ; Claude BERTHIAUME, Auteur ; R. GODBOUT, Auteur . - p.613-623. Langues : Anglais (eng) in Autism Research > 11-4 (April 2018) . - p.613-623 Mots-clés : Eeg  autism  autism spectrum disorder  delta activity  learning  memory  procedural memory  sleep Index. décimale : PER Périodiques Résumé : Delta EEG activity (0.75-3.75 Hz) during non-Rapid eye movement (NREM) sleep reflects the thalamo-cortical system contribution to memory consolidation. The functional integrity of this system is thought to be compromised in the Autism spectrum disorder (ASD). This lead us to investigate the topography of NREM sleep Delta EEG activity in young adults with ASD and typically-developed individuals (TYP). The relationship between Delta EEG activity and sensory-motor procedural information was also examined using a rotary pursuit task. Two dependent variables were computed: a learning index (performance increase across trials) and a performance index (average performance for all trials). The ASD group showed less Delta EEG activity during NREM sleep over the parieto-occipital recording sites compared to the TYP group. Delta EEG activity dropped more abruptly from frontal to posterior regions in the ASD group. Both groups of participants learned the task at a similar rate but the ASD group performed less well in terms of contact time with the target. Delta EEG activity during NREM sleep, especially during stage 2, correlated positively with the learning index for electrodes located all over the cortex in the TYP group, but only in the frontal region in the ASD group. Delta EEG activity, especially during stage 2, correlated positively with the performance index, but in the ASD group only. These results reveal an atypical thalamo-cortical functioning over the parieto-occipital region in ASD. They also point toward an atypical relationship between the frontal area and the encoding of sensory-motor procedural memory in ASD. Autism Res 2018, 11: 613-623. (c) 2018 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Slow EEG waves recorded from the scalp during sleep are thought to facilitate learning and memory during daytime. We compared these EEG waves in young autistic adults to typically-developing young adults. We found less slow EEG waves in the ASD group and the pattern of relationship with memory differed between groups. This suggests atypicalities in the way sleep mechanisms are associated with learning and performance in a sensory-motor procedural memory task in ASD individuals. En ligne : http://dx.doi.org/10.1002/aur.1933 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=358

Quebec Child Mental Health Survey: Prevalence of DSM-III-R Mental Health Disorders / Jean-Jacques BRETON in Journal of Child Psychology and Psychiatry, 40-3 (March 1999)

Permalink

The developmental trajectory of contrast sensitivity in autism spectrum disorder / Jacalyn GUY in Autism Research, 9-8 (August 2016)  

Permalink

---

1 (1 - 7 / 7)