6 recherche sur le mot-clé 'Semantic processing'

The Neurobiology of Semantic Processing in Autism Spectrum Disorder: An Activation Likelihood Estimation Analysis / L. PHAN in Journal of Autism and Developmental Disorders, 51-9 (September 2021)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 51-9 (September 2021) . - p.3266-3279 Titre : The Neurobiology of Semantic Processing in Autism Spectrum Disorder: An Activation Likelihood Estimation Analysis Type de document : Texte imprimé et/ou numérique Auteurs : L. PHAN, Auteur ; A. TARIQ, Auteur ; G. LAM, Auteur ; Elizabeth W. PANG, Auteur ; C. ALAIN, Auteur Article en page(s) : p.3266-3279 Langues : Anglais (eng) Mots-clés : Autism Spectrum Disorder  Brain/diagnostic imaging  Brain Mapping  Humans  Likelihood Functions  Magnetic Resonance Imaging  Semantics  Activation likelihood estimation  Autism spectrum disorder  Functional magnetic resonance imaging (fMRI)  Left inferior frontal gyrus  Semantic processing Index. décimale : PER Périodiques Résumé : Semantic processing impairments are present in a proportion of individuals with autism spectrum disorder (ASD). Despite the numerous imaging studies investigating this language domain in ASD, there is a lack of consensus regarding the brain structures showing abnormal pattern of activity. This meta-analysis aimed to identify neural activation patterns present during semantic processing in ASD. Findings reveal activation of areas associated with semantic processing and executive functions in ASD. However, the activation was less concise in comparison to controls and there was less activation in the right hemisphere and in areas associated with executive functions. This provides strong support for impaired semantic processing in ASD that is consistently associated with abnormal patterns of neural activity in the semantic network. En ligne : http://dx.doi.org/10.1007/s10803-020-04794-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453 [article] The Neurobiology of Semantic Processing in Autism Spectrum Disorder: An Activation Likelihood Estimation Analysis [Texte imprimé et/ou numérique] / L. PHAN, Auteur ; A. TARIQ, Auteur ; G. LAM, Auteur ; Elizabeth W. PANG, Auteur ; C. ALAIN, Auteur . - p.3266-3279. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 51-9 (September 2021) . - p.3266-3279 Mots-clés : Autism Spectrum Disorder  Brain/diagnostic imaging  Brain Mapping  Humans  Likelihood Functions  Magnetic Resonance Imaging  Semantics  Activation likelihood estimation  Autism spectrum disorder  Functional magnetic resonance imaging (fMRI)  Left inferior frontal gyrus  Semantic processing Index. décimale : PER Périodiques Résumé : Semantic processing impairments are present in a proportion of individuals with autism spectrum disorder (ASD). Despite the numerous imaging studies investigating this language domain in ASD, there is a lack of consensus regarding the brain structures showing abnormal pattern of activity. This meta-analysis aimed to identify neural activation patterns present during semantic processing in ASD. Findings reveal activation of areas associated with semantic processing and executive functions in ASD. However, the activation was less concise in comparison to controls and there was less activation in the right hemisphere and in areas associated with executive functions. This provides strong support for impaired semantic processing in ASD that is consistently associated with abnormal patterns of neural activity in the semantic network. En ligne : http://dx.doi.org/10.1007/s10803-020-04794-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=453

Differences in age-dependent neural correlates of semantic processing between youths with autism spectrum disorder and typically developing youths / Pin-Jane CHEN in Autism Research, 9-12 (December 2016)  

Public ISBD [article]  inAutism Research > 9-12 (December 2016) . - p.1263-1273 Titre : Differences in age-dependent neural correlates of semantic processing between youths with autism spectrum disorder and typically developing youths Type de document : Texte imprimé et/ou numérique Auteurs : Pin-Jane CHEN, Auteur ; Susan Shur-Fen GAU, Auteur ; Shu-Hui LEE, Auteur ; Tai-Li CHOU, Auteur Article en page(s) : p.1263-1273 Langues : Anglais (eng) Mots-clés : autism spectrum disorders (ASD)  fMRI  semantic processing  age-dependent Index. décimale : PER Périodiques Résumé : Individuals with autism spectrum disorders (ASD) have aberrant neural activity during semantic judgments. We aimed to examine age-dependent neural correlates of semantic processing in boys with ASD as compared to typically developing boys (TD). We used functional MRI to investigate 37 boys with ASD (mean age?=?13.3 years, standard deviation?=?2.4) and 35 age-, sex-, Intelligence quotient (IQ)- and handedness-matched TD boys (mean age?=?13.3 years, standard deviation?=?2.7) from age 8 to 18 years. Participants had to indicate whether pairs of Chinese characters presented visually were related in meaning. Group (ASD, TD) × Age (Old, Young) ANOVA was used to examine the difference of age-related changes. Direct comparisons between the adolescent group and the child group were also performed. The behavioral results showed that the ASD group had lower accuracy in the related condition relative to the TD group. The neuroimaging results showed greater activation in the cuneus and less activation in the left inferior frontal gyrus in boys with ASD than TD boys. Children with ASD produced greater activation in the cuneus than TD children. Adolescents with ASD showed reduced left IFG activation as compared to TD adolescents. Our findings suggest that TD boys may engage more in higher-level processing of retrieving or selecting semantic features while boys with ASD may rely more on lower-level visual processing during semantic judgments. The findings imply different functional organizations of the semantic system between the two groups. En ligne : http://dx.doi.org/10.1002/aur.1616 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=298 [article] Differences in age-dependent neural correlates of semantic processing between youths with autism spectrum disorder and typically developing youths [Texte imprimé et/ou numérique] / Pin-Jane CHEN, Auteur ; Susan Shur-Fen GAU, Auteur ; Shu-Hui LEE, Auteur ; Tai-Li CHOU, Auteur . - p.1263-1273. Langues : Anglais (eng) in Autism Research > 9-12 (December 2016) . - p.1263-1273 Mots-clés : autism spectrum disorders (ASD)  fMRI  semantic processing  age-dependent Index. décimale : PER Périodiques Résumé : Individuals with autism spectrum disorders (ASD) have aberrant neural activity during semantic judgments. We aimed to examine age-dependent neural correlates of semantic processing in boys with ASD as compared to typically developing boys (TD). We used functional MRI to investigate 37 boys with ASD (mean age?=?13.3 years, standard deviation?=?2.4) and 35 age-, sex-, Intelligence quotient (IQ)- and handedness-matched TD boys (mean age?=?13.3 years, standard deviation?=?2.7) from age 8 to 18 years. Participants had to indicate whether pairs of Chinese characters presented visually were related in meaning. Group (ASD, TD) × Age (Old, Young) ANOVA was used to examine the difference of age-related changes. Direct comparisons between the adolescent group and the child group were also performed. The behavioral results showed that the ASD group had lower accuracy in the related condition relative to the TD group. The neuroimaging results showed greater activation in the cuneus and less activation in the left inferior frontal gyrus in boys with ASD than TD boys. Children with ASD produced greater activation in the cuneus than TD children. Adolescents with ASD showed reduced left IFG activation as compared to TD adolescents. Our findings suggest that TD boys may engage more in higher-level processing of retrieving or selecting semantic features while boys with ASD may rely more on lower-level visual processing during semantic judgments. The findings imply different functional organizations of the semantic system between the two groups. En ligne : http://dx.doi.org/10.1002/aur.1616 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=298

Linguistic and Non-Linguistic Semantic Processing in Individuals with Autism Spectrum Disorders: An ERP Study / Emily L. CODERRE in Journal of Autism and Developmental Disorders, 47-3 (March 2017)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 47-3 (March 2017) . - p.795-812 Titre : Linguistic and Non-Linguistic Semantic Processing in Individuals with Autism Spectrum Disorders: An ERP Study Type de document : Texte imprimé et/ou numérique Auteurs : Emily L. CODERRE, Auteur ; Mariya CHERNENOK, Auteur ; Barry GORDON, Auteur ; Kerry LEDOUX, Auteur Article en page(s) : p.795-812 Langues : Anglais (eng) Mots-clés : Autism spectrum disorders  Semantic processing  ERP  Language  Pictures Index. décimale : PER Périodiques Résumé : Individuals with autism spectrum disorders (ASD) experience difficulties with language, particularly higher-level functions like semantic integration. Yet some studies indicate that semantic processing of non-linguistic stimuli is not impaired, suggesting a language-specific deficit in semantic processing. Using a semantic priming task, we compared event-related potentials (ERPs) in response to lexico-semantic processing (written words) and visuo-semantic processing (pictures) in adults with ASD and adults with typical development (TD). The ASD group showed successful lexico-semantic and visuo-semantic processing, indicated by similar N400 effects between groups for word and picture stimuli. However, differences in N400 latency and topography in word conditions suggested different lexico-semantic processing mechanisms: an expectancy-based strategy for the TD group but a controlled post-lexical integration strategy for the ASD group. En ligne : http://dx.doi.org/10.1007/s10803-016-2985-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=304 [article] Linguistic and Non-Linguistic Semantic Processing in Individuals with Autism Spectrum Disorders: An ERP Study [Texte imprimé et/ou numérique] / Emily L. CODERRE, Auteur ; Mariya CHERNENOK, Auteur ; Barry GORDON, Auteur ; Kerry LEDOUX, Auteur . - p.795-812. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 47-3 (March 2017) . - p.795-812 Mots-clés : Autism spectrum disorders  Semantic processing  ERP  Language  Pictures Index. décimale : PER Périodiques Résumé : Individuals with autism spectrum disorders (ASD) experience difficulties with language, particularly higher-level functions like semantic integration. Yet some studies indicate that semantic processing of non-linguistic stimuli is not impaired, suggesting a language-specific deficit in semantic processing. Using a semantic priming task, we compared event-related potentials (ERPs) in response to lexico-semantic processing (written words) and visuo-semantic processing (pictures) in adults with ASD and adults with typical development (TD). The ASD group showed successful lexico-semantic and visuo-semantic processing, indicated by similar N400 effects between groups for word and picture stimuli. However, differences in N400 latency and topography in word conditions suggested different lexico-semantic processing mechanisms: an expectancy-based strategy for the TD group but a controlled post-lexical integration strategy for the ASD group. En ligne : http://dx.doi.org/10.1007/s10803-016-2985-0 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=304

In the Eye of the Beholder: Rapid Visual Perception of Real-Life Scenes by Young Adults with and Without ASD / Steven VANMARCKE in Journal of Autism and Developmental Disorders, 46-8 (August 2016)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 46-8 (August 2016) . - p.2635-2652 Titre : In the Eye of the Beholder: Rapid Visual Perception of Real-Life Scenes by Young Adults with and Without ASD Type de document : Texte imprimé et/ou numérique Auteurs : Steven VANMARCKE, Auteur ; Caitlin MULLIN, Auteur ; Ruth VAN DER HALLEN, Auteur ; Kris EVERS, Auteur ; Ilse NOENS, Auteur ; Jean STEYAERT, Auteur ; Johan WAGEMANS, Auteur Article en page(s) : p.2635-2652 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder  Rapid visual perception  Local/global processing  Open-encoding  Semantic processing Index. décimale : PER Périodiques Résumé : Typically developing (TD) adults are able to extract global information from natural images and to categorize them within a single glance. This study aimed at extending these findings to individuals with autism spectrum disorder (ASD) using a free description open-encoding paradigm. Participants were asked to freely describe what they saw when looking at briefly presented real-life photographs. Our results show subtle but consistent group-level differences. More specifically, individuals with ASD spontaneously reported the presence of people in the display less frequently than TD participants, and they grasped the gist of the scene less well. These findings argue for a less efficient rapid feedforward processing of global semantic aspects and a less spontaneous interpretation of socially salient information in ASD. En ligne : http://dx.doi.org/10.1007/s10803-016-2802-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=290 [article] In the Eye of the Beholder: Rapid Visual Perception of Real-Life Scenes by Young Adults with and Without ASD [Texte imprimé et/ou numérique] / Steven VANMARCKE, Auteur ; Caitlin MULLIN, Auteur ; Ruth VAN DER HALLEN, Auteur ; Kris EVERS, Auteur ; Ilse NOENS, Auteur ; Jean STEYAERT, Auteur ; Johan WAGEMANS, Auteur . - p.2635-2652. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 46-8 (August 2016) . - p.2635-2652 Mots-clés : Autism spectrum disorder  Rapid visual perception  Local/global processing  Open-encoding  Semantic processing Index. décimale : PER Périodiques Résumé : Typically developing (TD) adults are able to extract global information from natural images and to categorize them within a single glance. This study aimed at extending these findings to individuals with autism spectrum disorder (ASD) using a free description open-encoding paradigm. Participants were asked to freely describe what they saw when looking at briefly presented real-life photographs. Our results show subtle but consistent group-level differences. More specifically, individuals with ASD spontaneously reported the presence of people in the display less frequently than TD participants, and they grasped the gist of the scene less well. These findings argue for a less efficient rapid feedforward processing of global semantic aspects and a less spontaneous interpretation of socially salient information in ASD. En ligne : http://dx.doi.org/10.1007/s10803-016-2802-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=290

Visual and Verbal Narrative Comprehension in Children and Adolescents with Autism Spectrum Disorders: An ERP Study / Mirella MANFREDI in Journal of Autism and Developmental Disorders, 50-8 (August 2020)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 50-8 (August 2020) . - p.2658-2672 Titre : Visual and Verbal Narrative Comprehension in Children and Adolescents with Autism Spectrum Disorders: An ERP Study Type de document : Texte imprimé et/ou numérique Auteurs : Mirella MANFREDI, Auteur ; Neil COHN, Auteur ; Pamella SANCHEZ MELLO, Auteur ; Elizabeth FERNANDEZ, Auteur ; Paulo Sérgio BOGGIO, Auteur Article en page(s) : p.2658-2672 Langues : Anglais (eng) Mots-clés : Autism  Lp  N400  Semantic processing  Visual narrative Index. décimale : PER Périodiques Résumé : We examined semantic processing in ASD children by presenting sentences with congruent or incongruent final words and visual narratives with congruent or incongruent final panels. An N400 effect to incongruent words appeared as compared to congruent ones, which was attenuated for the ASD children. We observed a negativity sustained to incongruous than congruous words, but only for the TD children. Incongruent panels evoked a greater fronto-central N400 amplitude than congruent panels in both groups. In addition, incongruent panels evoked a centro-parietal late positivity, only in controls. In conclusion, ASD children face processing deficits in both verbal and visual materials when integrating meaning across information, though such impairments may arise in different parts of the interpretive process, depending on the modality. En ligne : http://dx.doi.org/10.1007/s10803-020-04374-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=428 [article] Visual and Verbal Narrative Comprehension in Children and Adolescents with Autism Spectrum Disorders: An ERP Study [Texte imprimé et/ou numérique] / Mirella MANFREDI, Auteur ; Neil COHN, Auteur ; Pamella SANCHEZ MELLO, Auteur ; Elizabeth FERNANDEZ, Auteur ; Paulo Sérgio BOGGIO, Auteur . - p.2658-2672. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 50-8 (August 2020) . - p.2658-2672 Mots-clés : Autism  Lp  N400  Semantic processing  Visual narrative Index. décimale : PER Périodiques Résumé : We examined semantic processing in ASD children by presenting sentences with congruent or incongruent final words and visual narratives with congruent or incongruent final panels. An N400 effect to incongruent words appeared as compared to congruent ones, which was attenuated for the ASD children. We observed a negativity sustained to incongruous than congruous words, but only for the TD children. Incongruent panels evoked a greater fronto-central N400 amplitude than congruent panels in both groups. In addition, incongruent panels evoked a centro-parietal late positivity, only in controls. In conclusion, ASD children face processing deficits in both verbal and visual materials when integrating meaning across information, though such impairments may arise in different parts of the interpretive process, depending on the modality. En ligne : http://dx.doi.org/10.1007/s10803-020-04374-x Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=428

Explaining metaphors in high-functioning Autism Spectrum Disorder children: A brief report / Sergio MELOGNO in Research in Autism Spectrum Disorders, 6-2 (April-June 2012)  

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