36 recherche sur le mot-clé 'Face perception'

Atypical Face Perception in Autism: A Point of View? / Karine MORIN in Autism Research, 8-5 (October 2015)  

Public ISBD [article]  inAutism Research > 8-5 (October 2015) . - p.497-506 Titre : Atypical Face Perception in Autism: A Point of View? Type de document : Texte imprimé et/ou numérique Auteurs : Karine MORIN, Auteur ; Jacalyn GUY, Auteur ; Claudine HABAK, Auteur ; Hugh R. WILSON, Auteur ; Linda PAGANI, Auteur ; Laurent MOTTRON, Auteur ; Armando BERTONE, Auteur Article en page(s) : p.497-506 Langues : Anglais (eng) Mots-clés : autism spectrum disorder  face perception  local  global  synthetic faces  viewpoint change Index. décimale : PER Périodiques Résumé : Face perception is the most commonly used visual metric of social perception in autism. However, when found to be atypical, the origin of face perception differences in autism is contentious. One hypothesis proposes that a locally oriented visual analysis, characteristic of individuals with autism, ultimately affects performance on face tasks where a global analysis is optimal. The objective of this study was to evaluate this hypothesis by assessing face identity discrimination with synthetic faces presented with and without changes in viewpoint, with the former condition minimizing access to local face attributes used for identity discrimination. Twenty-eight individuals with autism and 30 neurotypical participants performed a face identity discrimination task. Stimuli were synthetic faces extracted from traditional face photographs in both front and 20° side viewpoints, digitized from 37 points to provide a continuous measure of facial geometry. Face identity discrimination thresholds were obtained using a two-alternative, temporal forced choice match-to-sample paradigm. Analyses revealed an interaction between group and condition, with group differences found only for the viewpoint change condition, where performance in the autism group was decreased compared to that of neurotypical participants. The selective decrease in performance for the viewpoint change condition suggests that face identity discrimination in autism is more difficult when access to local cues is minimized, and/or when dependence on integrative analysis is increased. These results lend support to a perceptual contribution of atypical face perception in autism. Autism Res 2015, 8: 497–506. © 2015 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1464 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=270 [article] Atypical Face Perception in Autism: A Point of View? [Texte imprimé et/ou numérique] / Karine MORIN, Auteur ; Jacalyn GUY, Auteur ; Claudine HABAK, Auteur ; Hugh R. WILSON, Auteur ; Linda PAGANI, Auteur ; Laurent MOTTRON, Auteur ; Armando BERTONE, Auteur . - p.497-506. Langues : Anglais (eng) in Autism Research > 8-5 (October 2015) . - p.497-506 Mots-clés : autism spectrum disorder  face perception  local  global  synthetic faces  viewpoint change Index. décimale : PER Périodiques Résumé : Face perception is the most commonly used visual metric of social perception in autism. However, when found to be atypical, the origin of face perception differences in autism is contentious. One hypothesis proposes that a locally oriented visual analysis, characteristic of individuals with autism, ultimately affects performance on face tasks where a global analysis is optimal. The objective of this study was to evaluate this hypothesis by assessing face identity discrimination with synthetic faces presented with and without changes in viewpoint, with the former condition minimizing access to local face attributes used for identity discrimination. Twenty-eight individuals with autism and 30 neurotypical participants performed a face identity discrimination task. Stimuli were synthetic faces extracted from traditional face photographs in both front and 20° side viewpoints, digitized from 37 points to provide a continuous measure of facial geometry. Face identity discrimination thresholds were obtained using a two-alternative, temporal forced choice match-to-sample paradigm. Analyses revealed an interaction between group and condition, with group differences found only for the viewpoint change condition, where performance in the autism group was decreased compared to that of neurotypical participants. The selective decrease in performance for the viewpoint change condition suggests that face identity discrimination in autism is more difficult when access to local cues is minimized, and/or when dependence on integrative analysis is increased. These results lend support to a perceptual contribution of atypical face perception in autism. Autism Res 2015, 8: 497–506. © 2015 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1464 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=270

Face memory and face perception in autism / M. STANTI? in Autism, 26-1 (January 2022)  

Public ISBD [article]  inAutism > 26-1 (January 2022) . - p.276-280 Titre : Face memory and face perception in autism Type de document : Texte imprimé et/ou numérique Auteurs : M. STANTI?, Auteur ; E. ICHIJO, Auteur ; Caroline CATMUR, Auteur ; Geoffrey BIRD, Auteur Article en page(s) : p.276-280 Langues : Anglais (eng) Mots-clés : Cfmt  Gfmt  Ofmt  face memory  face perception  of interest with respect to the research, authorship, and/or publication of this  article. Index. décimale : PER Périodiques Résumé : It is well known that some people with autism have difficulties recognizing faces. It is generally thought that this is not because autistic individuals cannot perceive faces, but because autistic individuals have greater problems than people without autism in remembering faces. Here, we worked with a group of autistic adults and a group of non-autistic adults to test their ability to perceive and remember faces. We also asked each person to report any difficulties that they have with recognizing faces in everyday life. We find that, as a group, people with autism have difficulties with both remembering and perceiving faces, and report more problems recognizing faces in everyday life. However, it is worth noting that we observed a wide range of scores in the group of people with autism, with some autistic participants scoring as well as the group of people without autism. En ligne : http://dx.doi.org/10.1177/13623613211027685 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=451 [article] Face memory and face perception in autism [Texte imprimé et/ou numérique] / M. STANTI?, Auteur ; E. ICHIJO, Auteur ; Caroline CATMUR, Auteur ; Geoffrey BIRD, Auteur . - p.276-280. Langues : Anglais (eng) in Autism > 26-1 (January 2022) . - p.276-280 Mots-clés : Cfmt  Gfmt  Ofmt  face memory  face perception  of interest with respect to the research, authorship, and/or publication of this  article. Index. décimale : PER Périodiques Résumé : It is well known that some people with autism have difficulties recognizing faces. It is generally thought that this is not because autistic individuals cannot perceive faces, but because autistic individuals have greater problems than people without autism in remembering faces. Here, we worked with a group of autistic adults and a group of non-autistic adults to test their ability to perceive and remember faces. We also asked each person to report any difficulties that they have with recognizing faces in everyday life. We find that, as a group, people with autism have difficulties with both remembering and perceiving faces, and report more problems recognizing faces in everyday life. However, it is worth noting that we observed a wide range of scores in the group of people with autism, with some autistic participants scoring as well as the group of people without autism. En ligne : http://dx.doi.org/10.1177/13623613211027685 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=451

Improving emotional face perception in autism with diuretic bumetanide: A proof-of-concept behavioral and functional brain imaging pilot study / Nouchine HADJIKHANI in Autism, 19-2 (February 2015)  

Public ISBD [article]  inAutism > 19-2 (February 2015) . - p.149-157 Titre : Improving emotional face perception in autism with diuretic bumetanide: A proof-of-concept behavioral and functional brain imaging pilot study Type de document : Texte imprimé et/ou numérique Auteurs : Nouchine HADJIKHANI, Auteur ; Nicole R. ZÜRCHER, Auteur ; Ophelie ROGIER, Auteur ; Torsten RUEST, Auteur ; Loyse HIPPOLYTE, Auteur ; Yehezkel BEN-ARI, Auteur ; Eric LEMONNIER, Auteur Article en page(s) : p.149-157 Langues : Anglais (eng) Mots-clés : Autism spectrum disorders  bumetanide  emotion  face perception  fMRI  GABA  treatment Index. décimale : PER Périodiques Résumé : Clinical observations have shown that GABA-acting benzodiazepines exert paradoxical excitatory effects in autism, suggesting elevated intracellular chloride (Cl–)i and excitatory action of GABA. In a previous double-blind randomized study, we have shown that the diuretic NKCC1 chloride importer antagonist bumetanide, that decreases (Cl–)i and reinforces GABAergic inhibition, reduces the severity of autism symptoms. Here, we report results from an open-label trial pilot study in which we used functional magnetic resonance imaging and neuropsychological testing to determine the effects of 10 months bumetanide treatment in adolescents and young adults with autism. We show that bumetanide treatment improves emotion recognition and enhances the activation of brain regions involved in social and emotional perception during the perception of emotional faces. The improvement of emotion processing by bumetanide reinforces the usefulness of bumetanide as a promising treatment to improve social interactions in autism. En ligne : http://dx.doi.org/10.1177/1362361313514141 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=256 [article] Improving emotional face perception in autism with diuretic bumetanide: A proof-of-concept behavioral and functional brain imaging pilot study [Texte imprimé et/ou numérique] / Nouchine HADJIKHANI, Auteur ; Nicole R. ZÜRCHER, Auteur ; Ophelie ROGIER, Auteur ; Torsten RUEST, Auteur ; Loyse HIPPOLYTE, Auteur ; Yehezkel BEN-ARI, Auteur ; Eric LEMONNIER, Auteur . - p.149-157. Langues : Anglais (eng) in Autism > 19-2 (February 2015) . - p.149-157 Mots-clés : Autism spectrum disorders  bumetanide  emotion  face perception  fMRI  GABA  treatment Index. décimale : PER Périodiques Résumé : Clinical observations have shown that GABA-acting benzodiazepines exert paradoxical excitatory effects in autism, suggesting elevated intracellular chloride (Cl–)i and excitatory action of GABA. In a previous double-blind randomized study, we have shown that the diuretic NKCC1 chloride importer antagonist bumetanide, that decreases (Cl–)i and reinforces GABAergic inhibition, reduces the severity of autism symptoms. Here, we report results from an open-label trial pilot study in which we used functional magnetic resonance imaging and neuropsychological testing to determine the effects of 10 months bumetanide treatment in adolescents and young adults with autism. We show that bumetanide treatment improves emotion recognition and enhances the activation of brain regions involved in social and emotional perception during the perception of emotional faces. The improvement of emotion processing by bumetanide reinforces the usefulness of bumetanide as a promising treatment to improve social interactions in autism. En ligne : http://dx.doi.org/10.1177/1362361313514141 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=256

Priming Facial Gender and Emotional Valence: The Influence of Spatial Frequency on Face Perception in ASD / Steven VANMARCKE in Journal of Autism and Developmental Disorders, 47-4 (April 2017)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 47-4 (April 2017) . - p.927-946 Titre : Priming Facial Gender and Emotional Valence: The Influence of Spatial Frequency on Face Perception in ASD Type de document : Texte imprimé et/ou numérique Auteurs : Steven VANMARCKE, Auteur ; Johan WAGEMANS, Auteur Article en page(s) : p.927-946 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder  Face perception  Vision research  Spatial frequency Index. décimale : PER Périodiques Résumé : Adolescents with and without autism spectrum disorder (ASD) performed two priming experiments in which they implicitly processed a prime stimulus, containing high and/or low spatial frequency information, and then explicitly categorized a target face either as male/female (gender task) or as positive/negative (Valence task). Adolescents with ASD made more categorization errors than typically developing adolescents. They also showed an age-dependent improvement in categorization speed and had more difficulties with categorizing facial expressions than gender. However, in neither of the categorization tasks, we found group differences in the processing of coarse versus fine prime information. This contradicted our expectations, and indicated that the perceptual differences between adolescents with and without ASD critically depended on the processing time available for the primes. En ligne : http://dx.doi.org/10.1007/s10803-016-3017-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=304 [article] Priming Facial Gender and Emotional Valence: The Influence of Spatial Frequency on Face Perception in ASD [Texte imprimé et/ou numérique] / Steven VANMARCKE, Auteur ; Johan WAGEMANS, Auteur . - p.927-946. Langues : Anglais (eng) in Journal of Autism and Developmental Disorders > 47-4 (April 2017) . - p.927-946 Mots-clés : Autism spectrum disorder  Face perception  Vision research  Spatial frequency Index. décimale : PER Périodiques Résumé : Adolescents with and without autism spectrum disorder (ASD) performed two priming experiments in which they implicitly processed a prime stimulus, containing high and/or low spatial frequency information, and then explicitly categorized a target face either as male/female (gender task) or as positive/negative (Valence task). Adolescents with ASD made more categorization errors than typically developing adolescents. They also showed an age-dependent improvement in categorization speed and had more difficulties with categorizing facial expressions than gender. However, in neither of the categorization tasks, we found group differences in the processing of coarse versus fine prime information. This contradicted our expectations, and indicated that the perceptual differences between adolescents with and without ASD critically depended on the processing time available for the primes. En ligne : http://dx.doi.org/10.1007/s10803-016-3017-9 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=304

Oxytocin impacts top-down and bottom-up social perception in adolescents with ASD: a MEG study of neural connectivity / Adi KORISKY in Molecular Autism, 13 (2022)  

Public ISBD [article]  inMolecular Autism > 13 (2022) . - 36 p. Titre : Oxytocin impacts top-down and bottom-up social perception in adolescents with ASD: a MEG study of neural connectivity Type de document : Texte imprimé et/ou numérique Auteurs : Adi KORISKY, Auteur ; Ilanit GORDON, Auteur ; Abraham GOLDSTEIN, Auteur Article en page(s) : 36 p. Langues : Anglais (eng) Mots-clés : Administration, Intranasal  Animals  Autistic Disorder/diagnostic imaging/drug therapy  Double-Blind Method  Facial Recognition/physiology  Magnetic Resonance Imaging/methods  Oxytocin/pharmacology  Social Perception  Autism  Connectivity  Face perception  Gamma  Meg  Oxytocin  personal or financial interests that could influence the study in this paper. Index. décimale : PER Périodiques Résumé : BACKGROUND: In the last decade, accumulative evidence has shown that oxytocin can modulate social perception in typically developed individuals and individuals diagnosed with autism. While several studies show that oxytocin (OT) modulates neural activation in social-related neural regions, the mechanism that underlies OT effects in ASD is not fully known yet. Despite evidence from animal studies on connections between the oxytocinergic system and excitation/inhibition neural balance, the influence of OT on oscillatory responses among individuals with ASD has been rarely examined. To bridge these gaps in knowledge, we investigated the effects of OT on both social and non-social stimuli while focusing on its specific influence on the neural connectivity between three socially related neural regions-the left and right fusiform and the medial frontal cortex. METHODS: Twenty-five adolescents with ASD participated in a wall-established social task during a randomized, double-blind placebo-controlled MEG and OT administration study. Our main task was a social-related task that required the identification of social and non-social-related pictures. We hypothesized that OT would modulate the oscillatory connectivity between three pre-selected regions of interest to be more adaptive to social processing. Specifically, we focused on alpha and gamma bands which are known to play an important role in face processing and top-down/bottom-up balance. RESULTS: Compared to placebo, OT reduced the connectivity between the medial frontal cortex and the fusiform in the low gamma more for social stimuli than for non-social ones, a reduction that was correlated with individuals' performance in the task. Additionally, for both social and non-social stimuli, OT increased the connectivity in the alpha and beta bands. LIMITATIONS: Sample size was determined based on sample sizes previously reported in MEG in clinical populations, especially OT administration studies in combination with neuroimaging in ASD. We were limited in our capability to recruit for such a study, and as such, the sample size was not based on a priori power analysis. Additionally, we limited our analyses to specific neural bands and regions. To validate the current results, future studies may be needed to explore other parameters using whole-brain approaches in larger samples. CONCLUSION: These results suggest that OT influenced social perception by modifying the communication between frontal and posterior regions, an attenuation that potentially impacts both social and non-social early perception. We also show that OT influences differ between top-down and bottom-up processes, depending on the social context. Overall, by showing that OT influences both social-related perception and overall attention during early processing stages, we add new information to the existing understanding of the impact of OT on neural processing in ASD. Furthermore, by highlighting the influence of OT on early perception, we provide new directions for treatments for difficulties in early attentional phases in this population. Trial registration Registered on October 27, 2021-Retrospectively registered, https://clinicaltrials.gov/ct2/show/record/NCT05096676 (details on clinical registration can be found in www. CLINICALTRIAL: gov , unique identifier: NCT05096676 ). En ligne : http://dx.doi.org/10.1186/s13229-022-00513-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=491 [article] Oxytocin impacts top-down and bottom-up social perception in adolescents with ASD: a MEG study of neural connectivity [Texte imprimé et/ou numérique] / Adi KORISKY, Auteur ; Ilanit GORDON, Auteur ; Abraham GOLDSTEIN, Auteur . - 36 p. Langues : Anglais (eng) in Molecular Autism > 13 (2022) . - 36 p. Mots-clés : Administration, Intranasal  Animals  Autistic Disorder/diagnostic imaging/drug therapy  Double-Blind Method  Facial Recognition/physiology  Magnetic Resonance Imaging/methods  Oxytocin/pharmacology  Social Perception  Autism  Connectivity  Face perception  Gamma  Meg  Oxytocin  personal or financial interests that could influence the study in this paper. Index. décimale : PER Périodiques Résumé : BACKGROUND: In the last decade, accumulative evidence has shown that oxytocin can modulate social perception in typically developed individuals and individuals diagnosed with autism. While several studies show that oxytocin (OT) modulates neural activation in social-related neural regions, the mechanism that underlies OT effects in ASD is not fully known yet. Despite evidence from animal studies on connections between the oxytocinergic system and excitation/inhibition neural balance, the influence of OT on oscillatory responses among individuals with ASD has been rarely examined. To bridge these gaps in knowledge, we investigated the effects of OT on both social and non-social stimuli while focusing on its specific influence on the neural connectivity between three socially related neural regions-the left and right fusiform and the medial frontal cortex. METHODS: Twenty-five adolescents with ASD participated in a wall-established social task during a randomized, double-blind placebo-controlled MEG and OT administration study. Our main task was a social-related task that required the identification of social and non-social-related pictures. We hypothesized that OT would modulate the oscillatory connectivity between three pre-selected regions of interest to be more adaptive to social processing. Specifically, we focused on alpha and gamma bands which are known to play an important role in face processing and top-down/bottom-up balance. RESULTS: Compared to placebo, OT reduced the connectivity between the medial frontal cortex and the fusiform in the low gamma more for social stimuli than for non-social ones, a reduction that was correlated with individuals' performance in the task. Additionally, for both social and non-social stimuli, OT increased the connectivity in the alpha and beta bands. LIMITATIONS: Sample size was determined based on sample sizes previously reported in MEG in clinical populations, especially OT administration studies in combination with neuroimaging in ASD. We were limited in our capability to recruit for such a study, and as such, the sample size was not based on a priori power analysis. Additionally, we limited our analyses to specific neural bands and regions. To validate the current results, future studies may be needed to explore other parameters using whole-brain approaches in larger samples. CONCLUSION: These results suggest that OT influenced social perception by modifying the communication between frontal and posterior regions, an attenuation that potentially impacts both social and non-social early perception. We also show that OT influences differ between top-down and bottom-up processes, depending on the social context. Overall, by showing that OT influences both social-related perception and overall attention during early processing stages, we add new information to the existing understanding of the impact of OT on neural processing in ASD. Furthermore, by highlighting the influence of OT on early perception, we provide new directions for treatments for difficulties in early attentional phases in this population. Trial registration Registered on October 27, 2021-Retrospectively registered, https://clinicaltrials.gov/ct2/show/record/NCT05096676 (details on clinical registration can be found in www. CLINICALTRIAL: gov , unique identifier: NCT05096676 ). En ligne : http://dx.doi.org/10.1186/s13229-022-00513-6 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=491

Sex Differences in Social Perception in Children with ASD / M. C. COFFMAN in Journal of Autism and Developmental Disorders, 45-2 (February 2015)  

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Brief Report: Faces Cause Less Distraction in Autism / Deborah M. RIBY in Journal of Autism and Developmental Disorders, 42-4 (April 2012)  

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The Development of Facial Gender Categorization in Individuals with and without Autism: The Impact of Typicality / Mark S. STRAUSS in Journal of Autism and Developmental Disorders, 42-9 (September 2012)  

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Face-Processing Performance is an Independent Predictor of Social Affect as Measured by the Autism Diagnostic Observation Schedule Across Large-Scale Datasets / I. ZAGURY-ORLY in Journal of Autism and Developmental Disorders, 52-2 (February 2022)  

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Face recognition performance of individuals with Asperger syndrome on the Cambridge face memory test / Darren HEDLEY in Autism Research, 4-6 (December 2011)  

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